Oxygen generator with mesoporous oxygen-producing pill

Abstract

The present application relates to the technical field of breathing equipment, and specifically discloses an oxygen generator with a mesoporous medicine column, which comprises a percussion ignition mechanism, an ignition end cover, a cylinder body, a bell jar, a heat insulation inner cylinder, an oxygen production medicine column, heat insulation material, a support bowl, gas purification material, a safety valve, an air outlet end cover and an air outlet connector, one end of the cylinder body is provided with the ignition end cover; the percussion ignition mechanism is fixed on the ignition end cover; the oxygen production medicine column is coaxial with the cylinder body, one end of the oxygen production medicine column is connected with the percussion ignition mechanism, and the other end of the oxygen production medicine column is connected with the support bowl; the support bowl is connected with a separation net, the heat insulation inner cylinder is arranged outside the oxygen production medicine column and the heat insulation material, and is used for reducing the transmission of heat generated by the oxygen production medicine column to the external environment; the bell jar is arranged on one end of the oxygen production medicine column connected with the percussion ignition mechanism; the support bowl is arranged at the rear end of the oxygen production medicine column, and the support bowl is internally provided with the gas purification material; the air outlet end cover is arranged at the rear end of the gas purification material; the air outlet connector is arranged on the air outlet end cover; and the safety valve is arranged on the air outlet end cover.

Description

Technical Field

[0001] This invention relates to the field of respiratory equipment technology, and more specifically, to an oxygen generator with a centrally located oxygen-generating drug column. Background Technology

[0002] A solid oxygen generator is a chemical oxygen production device. After being activated by a trigger or electricity, a solid oxygen-containing substance undergoes a continuous decomposition reaction, thus stably producing oxygen. Because the oxygen production process is similar to candle burning, it is also called an "oxygen candle." Solid oxygen generators are characterized by their small size, large oxygen storage capacity, light weight, safety and reliability, long-term storage capability, and ease of use. They can serve as a standby or emergency oxygen source for personnel breathing in confined spaces and are applicable in various fields such as aviation, aerospace, shipbuilding, coal mining, high-altitude environments, parachuting, and medical applications.

[0003] The oxygen-generating propellant columns used in solid oxygen generators are prepared through a process of dry mixing, wet mixing, pressing, and drying. Because the pressed propellant columns have a high density and are solid, it is difficult to completely dry the moisture inside. Moisture is a detrimental component of the oxygen-generating propellant columns. On the one hand, it affects the stable decomposition of the propellant columns, leading to fluctuations in the oxygen production flow rate; on the other hand, moisture can cause certain side reactions, increasing the content of impurity gases; and on the other hand, moisture can cause the carbon monoxide catalyst to degrade, thereby reducing the catalytic efficiency of the carbon monoxide catalyst.

[0004] During the gradual reaction process of the oxygen-generating propellant column, the high-temperature oxygen produced can preheat the unreacted propellant columns that follow, thus promoting the stable and continuous decomposition of the oxygen-generating propellant column. However, because the oxygen-generating propellant column is solid, the high-temperature gas flow can only preheat the column through its outer surface, failing to adequately preheat the internal reagents. This affects the oxygen production stability of the propellant column, a phenomenon that is more pronounced in low-temperature environments.

[0005] Therefore, how to provide an oxygen generator that ensures the stability of oxygen production from the oxygen-generating propellant column is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] To achieve the purpose of this invention, an oxygen generator with a centrally located propellant column is provided, comprising: an impact ignition mechanism, an ignition end cap, a cylinder, a bell jar, a heat-insulating inner cylinder, an oxygen-generating propellant column, heat-insulating material, a support bowl, a gas purification material, a safety valve, an isolation net, an outlet end cap, and an outlet connector.

[0007] The ignition end cap is provided at one end of the cylinder;

[0008] The impact ignition mechanism is fixed to the ignition end cap;

[0009] The oxygen-generating propellant column is on the same axis as the cylinder, with one end connected to the impact ignition mechanism and the other end connected to the support bowl;

[0010] The support bowl is connected to the isolation net to prevent impurities from passing through the vent end cap.

[0011] The heat-insulating inner cylinder is located outside the oxygen-generating drug column and the heat-insulating material, and is used to reduce the transfer of heat generated by the oxygen-generating drug column to the external environment.

[0012] The bell jar is located at the end where the oxygen-generating propellant column is connected to the impact ignition mechanism.

[0013] The support bowl is located at the rear end of the oxygen-generating drug column and is filled with the gas purification material.

[0014] The gas outlet cap is located at the rear end of the gas purification material;

[0015] The air outlet connector is located on the air outlet end cap;

[0016] The safety valve is located on the outlet end cover.

[0017] In some specific embodiments, the impact ignition mechanism includes: an activation pin, a spring, an impactor, and a flash cap;

[0018] Before the impact ignition mechanism is activated, the starting pin is inserted into the impactor to fix and limit it, and the spring is in a compressed state. When the impact ignition mechanism is activated, the starting pin is pulled out, the spring releases its compressed internal energy, the impactor moves under the action of the spring and impacts the flame cap. The agent inside the flame cap is burned after being impacted, and a high-temperature flame can be generated during combustion.

[0019] In some specific embodiments, the oxygen-generating propellant column includes: an igniter and a gas-generating propellant; the igniter is disposed in the head or central hole of the oxygen-generating propellant column.

[0020] In some specific embodiments, the oxygen-generating column is provided with a central through hole for guiding airflow.

[0021] In some specific embodiments, the heat insulation material is a high-temperature resistant material with low thermal conductivity, used to isolate the heat generated by the oxygen-generating propellant column from being transferred to the external environment.

[0022] In some specific embodiments, the support bowl is provided with heat-insulating inner cylinder airflow holes around its periphery and center, so that the gas produced by the oxygen-generating column can flow into the gas purification material through the heat-insulating inner cylinder airflow holes.

[0023] In some specific embodiments, the bottom of the heat-insulating inner cylinder is provided with an airflow hole a, so that the gas produced by the oxygen-generating column flows out through the airflow hole of the heat-insulating inner cylinder.

[0024] In some specific embodiments, the heat insulation material is wrapped around the oxygen-generating propellant column or inside the central hole. It is a high-temperature resistant material with low thermal conductivity, used to reduce the transfer of heat generated by the oxygen-generating propellant column to the external environment.

[0025] In some specific embodiments, the thermal insulation material is ceramic fiber cotton.

[0026] In some specific embodiments, when the gas pressure inside the oxygen generator is greater than the opening pressure of the safety valve, the safety valve opens and gas is discharged from the safety valve; when the gas pressure inside the oxygen generator is lower than the opening pressure of the safety valve, the safety valve closes and gas cannot be discharged from the safety valve.

[0027] The beneficial effects of the above technical solution are as follows:

[0028] The oxygen generator provided in this application has a central hole in its oxygen-generating column. The central hole facilitates drying of the oxygen-generating column, thereby reducing its moisture content and improving the oxygen generation stability and gas purity. The central hole can also be used to guide a high-temperature gas flow, fully preheating any unreacted reagents, further enhancing the oxygen generation stability and low-temperature adaptability of the generator. Thus, compared to existing oxygen generators using solid oxygen-generating columns, the oxygen generator of this embodiment exhibits more stable reaction, higher gas purity, and better low-temperature adaptability.

[0029] In addition, the igniter can be placed in the central hole of the oxygen-generating propellant column, which can effectively increase the reaction cross-sectional area of ​​the oxygen-generating propellant column and greatly improve the oxygen production rate, so that the solid oxygen generator can be applied to occasions with high oxygen flow rates. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of a typical existing oxygen generator.

[0032] Figure 2 This is a schematic diagram of a typical support bowl structure for an existing oxygen generator;

[0033] Figure 3 This is a schematic diagram of an oxygen generator with a centrally located propellant column according to Embodiment 1 of the present invention;

[0034] Figure 4 This is a schematic diagram of an oxygen generator with a centrally located propellant column according to Embodiment 2 of the present invention;

[0035] Figure 5 This is a schematic diagram of a support bowl structure for an oxygen generator with a centrally located propellant column, according to Embodiment 2 of the present invention.

[0036] Figure 6 This is a schematic diagram of an oxygen generator with a centrally located propellant column according to Embodiment 3 of the present invention.

[0037] In the attached diagram: 100 is the impact ignition mechanism; 200 is the oxygen-generating propellant; 300 is the safety valve; 1 is the starting pin; 2 is the impactor; 3 is the ignition end cap; 4 is the burner cap; 5 is the bell jar; 6 is the igniter; 7 is the gas-generating propellant; 8 is the cylinder; 9 is the heat insulation material; 10 is the heat-insulating inner cylinder; 11 is the spring; 12 is the support bowl; 13 is the gas purification material; 14 is the isolation net; 15 is the gas outlet end cap; and 17 is the gas outlet connector. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0039] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0040] Example 1

[0041] One embodiment of the present invention provides an oxygen generator with a centrally located propellant column, see reference. Figures 1-3 As shown, it includes: impact ignition mechanism 100, ignition end cap 3, cylinder 8, bell jar 5, heat insulation inner cylinder 10, oxygen-generating column 200, heat insulation material 9, support bowl 12, gas purification material 13, safety valve 300, isolation net 14, gas outlet end cap 15 and gas outlet connector 17.

[0042] The ignition end cap 3 is provided at one end of the cylinder 8;

[0043] The impact ignition mechanism 100 is fixed to the ignition end cap 3;

[0044] The oxygen-generating propellant column 200 is on the same axis as the cylinder, with one end connected to the impact ignition mechanism 100 and the other end connected to the support bowl 12.

[0045] The support bowl 12 is connected to the isolation net 14 to prevent impurities generated from passing through the vent end cap 15.

[0046] The heat-insulating inner cylinder 10 is located outside the oxygen-generating drug column 200 and the heat-insulating material 9, and is used to reduce the transfer of heat generated by the oxygen-generating drug column 200 to the external environment.

[0047] The bell jar 5 is installed at the end where the oxygen-generating propellant column 200 is connected to the impact ignition mechanism 100;

[0048] The support bowl 12 is located at the rear end of the oxygen-generating drug column 200 and is filled with the gas purification material 13.

[0049] The gas outlet cap 15 is located at the rear end of the gas purification material 13;

[0050] The air outlet connector 17 is provided on the air outlet end cap 15;

[0051] The safety valve 300 is located on the air outlet cover 15.

[0052] In a specific embodiment of the present invention, the impact ignition mechanism 100 includes: a starting pin 1, a spring 11, an impactor 2, and a spark cap 4;

[0053] Before the impact ignition mechanism 100 is in operation, the starting pin 1 is inserted into the impactor 2 to fix and limit it, and the spring 11 is in a compressed state. When the impact ignition mechanism 100 is in operation, the starting pin 1 is pulled out, the spring 11 releases its compressed internal energy, the impactor 2 moves under the action of the spring 11 and impacts the burner cap 4. The agent inside the burner cap 4 is burned after being impacted, and a high-temperature flame can be generated during combustion.

[0054] In one specific embodiment of the present invention, the oxygen-generating propellant column 200 includes: an igniter 6 and a gas-generating propellant 7; the igniter 6 is disposed in the head or central hole of the oxygen-generating propellant column 200.

[0055] In one specific embodiment of the present invention, the oxygen-generating drug column 200 is provided with a central through hole for guiding airflow.

[0056] Specifically, the oxygen-generating propellant column 200 mainly consists of an igniter 6 and a gas-generating propellant 7, the composition of which is shown in Table 1. The igniter 6 and the gas-generating propellant 7 can undergo a decomposition reaction under high temperature, producing oxygen and heat. The high-temperature flame generated by the burner cap 4 can directly ignite the igniter 6, and the gas-generating propellant 7 continues to decompose under the heat, thereby continuously producing oxygen. The oxygen-generating propellant column 200 has a central through-hole for guiding airflow. The igniter 6 can be located at the head of the oxygen-generating propellant column or inside its central hole.

[0057] Table 1 Typical formulations of oxygen-generating propellant columns

[0058]

[0059] The heat insulation material 9, which surrounds the oxygen-generating propellant column 200 and is located inside the central hole, is a high-temperature resistant material with low thermal conductivity. It is used to reduce the transfer of heat generated by the oxygen-generating propellant column to the external environment. The heat insulation material 9 is made of ceramic fiber cotton.

[0060] The heat-insulating inner cylinder 10 is located outside the oxygen-generating column 200 and the heat-insulating material 9, and is used to reduce the heat generated by the oxygen-generating column 200 from being transferred to the external environment. At the same time, the bottom of the heat-insulating inner cylinder 10 is provided with an airflow hole 10a, through which the gas generated by the oxygen-generating column can flow out.

[0061] The support bowl 12 is located at the rear end of the oxygen-generating drug column 200, and airflow holes 12a are provided around it. The gas generated by the oxygen-generating drug column can flow into the gas purification material 13 through the airflow holes 12a of the support bowl.

[0062] The gas purification material 13 is located at the front end of the gas outlet and is used to absorb trace impurities such as chlorine, carbon monoxide, and carbon dioxide in the generated gas. The gas purification material includes an alkaline material and a carbon monoxide catalyst. The carbon monoxide catalyst is a rod-shaped hogalat, and the alkaline material is a spherical lithium hydroxide.

[0063] The outlet cap 15 is located at the rear end of the oxygen generator, and the outlet connector 17 is located on the outlet cap 15, through which airflow can flow out.

[0064] The safety valve 300 is located on the gas outlet cover. When the gas pressure inside the oxygen generator is greater than the opening pressure of the safety valve 300, the safety valve 300 opens and the gas can be discharged from the safety valve 300. When the gas pressure inside the oxygen generator is lower than the opening pressure of the safety valve 300, the safety valve 300 closes and the gas cannot be discharged from the safety valve 300.

[0065] The working principle is as follows: The oxygen-generating propellant column 200 mainly consists of igniter 6 and gas-generating propellant 7. Igniter 6 and gas-generating propellant 7 can undergo a decomposition reaction under high temperature, producing oxygen and heat. When the impact ignition mechanism 100 is working, the starting pin 1 is pulled out, the spring 11 releases its compressed internal energy, and the impactor 2 moves under the action of the spring 11, thereby impacting the burner cap 4. The propellant inside the burner cap 4 burns after being impacted, producing a high-temperature flame. The high-temperature flame generated by the burner cap 4 can directly ignite the igniter 6. The gas-generating propellant 7 continues to undergo a decomposition reaction under the action of heat. The generated gas flows simultaneously through the outer side and central hole of the oxygen-generating propellant column, fully preheating the subsequent unreacted oxygen-generating propellant column 7b. The gas-generating propellant 7 burns along its axial end face, thereby continuously producing oxygen. The airflow sequentially flows through the airflow holes 10a of the heat-insulating inner cylinder and the airflow holes 12a of the support bowl into the gas purification material 13, and then flows out after the purification material absorbs impurities. The airflow direction is as follows: Figure 3 As indicated by the middle arrow.

[0066] Compared to existing oxygen generators, the oxygen-generating column in this embodiment has a central hole. During the reaction process of the oxygen-generating column, the airflow can simultaneously preheat both the inside and outside of the unreacted oxygen-generating column 7b. This preheating is more thorough than that of a solid column, further improving the oxygen generation stability and low-temperature environment adaptability of the oxygen generator.

[0067] Example 2

[0068] One embodiment of the present invention provides an oxygen generator with a centrally located propellant column, see reference. Figure 4 , Figure 5 As shown, it includes: impact ignition mechanism 100, ignition end cap 3, cylinder 8, bell jar 5, heat insulation inner cylinder 10, oxygen-generating column 200, heat insulation material 9, support bowl 12, gas purification material 13, safety valve 300, isolation net 14, gas outlet end cap 15 and gas outlet connector 17.

[0069] The ignition end cap 3 is provided at one end of the cylinder 8;

[0070] The impact ignition mechanism 100 is fixed to the ignition end cap 3;

[0071] The oxygen-generating propellant column 200 is on the same axis as the cylinder, with one end connected to the impact ignition mechanism 100 and the other end connected to the support bowl 12.

[0072] The support bowl 12 is connected to the isolation net 14 to prevent impurities generated from passing through the vent end cap 15.

[0073] The heat-insulating inner cylinder 10 is located outside the oxygen-generating drug column 200 and the heat-insulating material 9, and is used to reduce the transfer of heat generated by the oxygen-generating drug column 200 to the external environment.

[0074] The bell jar 5 is installed at the end where the oxygen-generating propellant column 200 is connected to the impact ignition mechanism 100;

[0075] The support bowl 12 is located at the rear end of the oxygen-generating drug column 200 and is filled with the gas purification material 13.

[0076] The gas outlet cap 15 is located at the rear end of the gas purification material 13;

[0077] The air outlet connector 17 is provided on the air outlet end cap 15;

[0078] The safety valve 300 is located on the air outlet cover 15.

[0079] In a specific embodiment of the present invention, the impact ignition mechanism 100 includes: a starting pin 1, a spring 11, an impactor 2, and a spark cap 4;

[0080] Before the impact ignition mechanism 100 is in operation, the starting pin 1 is inserted into the impactor 2 to fix and limit it, and the spring 11 is in a compressed state. When the impact ignition mechanism 100 is in operation, the starting pin 1 is pulled out, the spring 11 releases its compressed internal energy, the impactor 2 moves under the action of the spring 11 and impacts the burner cap 4. The agent inside the burner cap 4 is burned after being impacted, and a high-temperature flame can be generated during combustion.

[0081] In one specific embodiment of the present invention, the oxygen-generating propellant column 200 includes: an igniter 6 and a gas-generating propellant 7; the igniter 6 is disposed in the head or central hole of the oxygen-generating propellant column 200.

[0082] In one specific embodiment of the present invention, the oxygen-generating drug column 200 is provided with a central through hole for guiding airflow.

[0083] Specifically, the oxygen-generating propellant column 200 mainly consists of an igniter 6 and a gas-generating propellant 7, the composition of which is shown in Table 2. The igniter 6 and the gas-generating propellant 7 can undergo a decomposition reaction under high temperature, producing oxygen and heat. The high-temperature flame generated by the burner cap 4 can directly ignite the igniter 6, and the gas-generating propellant 7 continues to decompose under the heat, thereby continuously producing oxygen. The oxygen-generating propellant column 200 has a central through-hole for guiding airflow. The igniter 6 can be located at the head of the oxygen-generating propellant column.

[0084] Table 2 Typical formulations of oxygen-generating propellant columns

[0085]

[0086] The heat insulation material 9, which surrounds the oxygen-generating propellant column 200 and is located inside the central hole, is a high-temperature resistant material with low thermal conductivity. It is used to reduce the transfer of heat generated by the oxygen-generating propellant column to the external environment. The heat insulation material 9 is made of ceramic fiber cotton.

[0087] The heat-insulating inner cylinder 10 is located outside the oxygen-generating column 200 and the heat-insulating material 9, and is used to reduce the heat generated by the oxygen-generating column 200 from being transferred to the external environment. At the same time, the bottom of the heat-insulating inner cylinder 10 is provided with an airflow hole 10a, through which the gas generated by the oxygen-generating column can flow out.

[0088] The support bowl 12 is located at the rear end of the oxygen-generating column 200, and has airflow holes 12a and 12b around its periphery and center. The gas generated by the oxygen-generating column can flow into the gas purification material 13 through the airflow holes 12a and 12b of the support bowl. Its structure is as follows: Figure 5 As shown.

[0089] The gas purification material 13 is located at the front end of the gas outlet and is used to absorb trace impurities such as chlorine, carbon monoxide, and carbon dioxide in the generated gas. The gas purification material includes an alkaline material and a carbon monoxide catalyst. The carbon monoxide catalyst is a rod-shaped hogalat, and the alkaline material is a spherical lithium hydroxide.

[0090] The outlet cap 15 is located at the rear end of the oxygen generator, and the outlet connector 17 is located on the outlet cap 15, through which airflow can flow out.

[0091] The safety valve 300 is located on the gas outlet cover. When the gas pressure inside the oxygen generator is greater than the opening pressure of the safety valve 300, the safety valve 300 opens and the gas can be discharged from the safety valve 300. When the gas pressure inside the oxygen generator is lower than the opening pressure of the safety valve 300, the safety valve 300 closes and the gas cannot be discharged from the safety valve 300.

[0092] The working principle is as follows: The oxygen-generating propellant column 200 mainly consists of igniter 6 and gas-generating propellant 7. Igniter 6 and gas-generating propellant 7 can undergo a decomposition reaction under high temperature, producing oxygen and heat. When the impact ignition mechanism 100 is working, the starting pin 1 is pulled out, the spring 11 releases its compressed internal energy, and the impactor 2 moves under the action of the spring 11, thereby impacting the burner cap 4. The propellant inside the burner cap 4 burns under the impact force, producing a high-temperature flame. The high-temperature flame generated by the burner cap 4 can directly ignite the igniter 6. The gas-generating propellant 7 continues to undergo a decomposition reaction under the action of heat. The generated gas flows simultaneously through the outer side and central hole of the oxygen-generating propellant column 200, fully preheating the subsequent unreacted oxygen-generating propellant column 7b. The gas-generating propellant 7 burns along the axial end face, thus continuously producing oxygen. The airflow sequentially flows through the airflow holes 10a of the heat-insulating inner cylinder, 12a and 12b of the support bowl into the gas purification material 13, and then flows out after the purification material absorbs impurities. The airflow direction is as follows: Figure 4 As indicated by the middle arrow.

[0093] Compared to Embodiment 1, in this embodiment, the support bowl 12 is provided with airflow holes 12a and 12b around its periphery and center. The gas generated by the oxygen-generating column 200 can flow into the gas purification material 13 through the airflow holes 12a and 12b of the support bowl at the same time. This can effectively improve the utilization rate of the purification material in the airflow dead zone, thereby improving the overall utilization rate of the purification material. At the same time, it can reduce the amount of purification material used and the overall volume and weight of the oxygen generator.

[0094] Example 3

[0095] One embodiment of the present invention provides an oxygen generator with a centrally located propellant column, see reference. Figure 6As shown, it includes: impact ignition mechanism 100, ignition end cap 3, cylinder 8, bell jar 5, heat insulation inner cylinder 10, oxygen-generating column 200, heat insulation material 9, support bowl 12, gas purification material 13, safety valve 300, isolation net 14, gas outlet end cap 15 and gas outlet connector 17.

[0096] The ignition end cap 3 is provided at one end of the cylinder 8;

[0097] The impact ignition mechanism 100 is fixed to the ignition end cap 3;

[0098] The oxygen-generating propellant column 200 is on the same axis as the cylinder, with one end connected to the impact ignition mechanism 100 and the other end connected to the support bowl 12.

[0099] The support bowl 12 is connected to the isolation net 14 to prevent impurities generated from passing through the vent end cap 15.

[0100] The heat-insulating inner cylinder 10 is located outside the oxygen-generating drug column 200 and the heat-insulating material 9, and is used to reduce the transfer of heat generated by the oxygen-generating drug column 200 to the external environment.

[0101] The bell jar 5 is installed at the end where the oxygen-generating propellant column 200 is connected to the impact ignition mechanism 100;

[0102] The support bowl 12 is located at the rear end of the oxygen-generating drug column 200 and is filled with the gas purification material 13.

[0103] The gas outlet cap 15 is located at the rear end of the gas purification material 13;

[0104] The air outlet connector 17 is provided on the air outlet end cap 15;

[0105] The safety valve 300 is located on the air outlet cover 15.

[0106] In a specific embodiment of the present invention, the impact ignition mechanism 100 includes: a starting pin 1, a spring 11, an impactor 2, and a spark cap 4;

[0107] Before the impact ignition mechanism 100 is in operation, the starting pin 1 is inserted into the impactor 2 to fix and limit it, and the spring 11 is in a compressed state. When the impact ignition mechanism 100 is in operation, the starting pin 1 is pulled out, the spring 11 releases its compressed internal energy, the impactor 2 moves under the action of the spring 11 and impacts the burner cap 4. The agent inside the burner cap 4 is burned after being impacted, and a high-temperature flame can be generated during combustion.

[0108] In one specific embodiment of the present invention, the oxygen-generating propellant column 200 includes: an igniter 6 and a gas-generating propellant 7; the igniter 6 is disposed in the head or central hole of the oxygen-generating propellant column 200.

[0109] In one specific embodiment of the present invention, the oxygen-generating drug column 200 is provided with a central through hole for guiding airflow.

[0110] The oxygen-generating propellant column 200 mainly consists of an igniter 6 and a gas-generating propellant 7, the composition of which is shown in Table 3. The igniter 6 and the gas-generating propellant 7 can undergo a decomposition reaction under high temperature, producing oxygen and heat. The high-temperature flame generated by the burner cap 4 can directly ignite the igniter 6, and the gas-generating propellant 7 continues to decompose under the heat, thus continuously producing oxygen. The oxygen-generating propellant column 200 has a central through-hole for guiding airflow. The igniter 6 can be placed inside the central hole of the oxygen-generating propellant column 200.

[0111] Table 3 Typical formulations of oxygen-generating propellant columns

[0112]

[0113] The heat insulation material 9 surrounds the oxygen-generating propellant column 200, but the central hole is not filled with heat insulation material 9. It is a high-temperature resistant material with low thermal conductivity, used to reduce the transfer of heat generated by the oxygen-generating propellant column to the external environment. The heat insulation material 9 is made of ceramic fiber cotton.

[0114] The heat-insulating inner cylinder 10 is located outside the oxygen-generating column 200 and the heat-insulating material 9, and is used to reduce the heat generated by the oxygen-generating column 200 from being transferred to the external environment. At the same time, the bottom of the heat-insulating inner cylinder 10 is provided with an airflow hole 10a, through which the gas generated by the oxygen-generating column can flow out.

[0115] The support bowl 12 is located at the rear end of the oxygen-generating drug column 200, and airflow holes 12a are provided around it. The gas generated by the oxygen-generating drug column can flow into the gas purification material 13 through the airflow holes 12a of the support bowl.

[0116] The gas purification material 13 is located at the front end of the gas outlet and is used to absorb trace impurities such as chlorine, carbon monoxide, and carbon dioxide in the generated gas. The gas purification material includes an alkaline material and a carbon monoxide catalyst. The carbon monoxide catalyst is a rod-shaped hogalat, and the alkaline material is a spherical lithium hydroxide.

[0117] The outlet cap 15 is located at the rear end of the oxygen generator, and the outlet connector 17 is located on the outlet cap 15, through which airflow can flow out.

[0118] The safety valve 300 is located on the gas outlet cover. When the gas pressure inside the oxygen generator is greater than the opening pressure of the safety valve 300, the safety valve 300 opens and the gas can be discharged from the safety valve 300. When the gas pressure inside the oxygen generator is lower than the opening pressure of the safety valve 300, the safety valve 300 closes and the gas cannot be discharged from the safety valve 300.

[0119] The working principle is as follows: The oxygen-generating propellant column 200 mainly consists of igniter 6 and gas-generating propellant 7. Igniter 6 and gas-generating propellant 7 can undergo a decomposition reaction under high temperature to produce oxygen and heat. When the impact ignition mechanism 100 is working, the starting pin 1 is pulled out, the spring 11 releases its compressed internal energy, and the impactor 2 moves under the action of the spring 11, thereby impacting the burner cap 4. The propellant inside the burner cap 4 burns under the impact force, producing a high-temperature flame. The high-temperature flame generated by the burner cap 4 can directly ignite the igniter 6. The gas-generating propellant 7 continues to undergo a decomposition reaction under the action of heat. The generated gas flows simultaneously through the outer side and the central hole of the oxygen-generating propellant column 200, fully preheating the subsequent unreacted oxygen-generating propellant column 7b, thus continuously producing oxygen. The airflow sequentially flows through the airflow hole 10a of the heat-insulating inner cylinder and the airflow hole 12a of the support bowl into the gas purification material 13, and then flows out after the purification material absorbs impurities. The airflow direction is as follows: Figure 6 As indicated by the middle arrow.

[0120] Compared to Embodiments 1 and 2, in this embodiment, the igniter 6 is disposed within the central hole of the oxygen-generating propellant column 200, and the central hole of the oxygen-generating propellant column is not filled with heat-insulating material 9. After the burner cap 4 is activated, it can quickly ignite the igniter 6 in the center, and then ignite the gas-generating propellant 7. The gas-generating propellant 7 undergoes a radial decomposition reaction, greatly increasing the reaction cross-sectional area and achieving a higher oxygen production rate. Thus, the solid oxygen generator can be applied to occasions with high oxygen flow rates.

[0121] The methods and apparatus provided by the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

[0122] In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "a specific embodiment" or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0123] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An oxygen generator with a centrally located propellant column, characterized in that, include: Impact ignition mechanism (100), ignition end cap (3), cylinder (8), bell jar (5), heat-insulating inner cylinder (10), oxygen-generating column (200), heat-insulating material (9), support bowl (12), gas purification material (13), safety valve (300), isolation net (14), gas outlet end cap (15) and gas outlet connector (17); The ignition end cap (3) is provided at one end of the cylinder (8); The impact ignition mechanism (100) is fixed to the ignition end cap (3); The oxygen-generating propellant column (200) is on the same axis as the cylinder, with one end connected to the impact ignition mechanism (100) and the other end connected to the support bowl (12); The support bowl (12) is connected to the isolation net (14) to prevent impurities generated from passing through the vent end cap (15). The heat-insulating inner cylinder (10) is located outside the oxygen-generating drug column (200) and the heat-insulating material (9) to reduce the heat generated by the oxygen-generating drug column (200) from being transferred to the external environment. The bell jar (5) is placed over the end of the oxygen-generating propellant column (200) that is connected to the impact ignition mechanism (100); The support bowl (12) is located at the rear end of the oxygen-generating column (200) and is filled with the gas purification material (13). The gas outlet cap (15) is located at the rear end of the gas purification material (13); The air outlet connector (17) is provided on the air outlet end cap (15); The safety valve (300) is located on the outlet end cap (15); The oxygen-generating propellant column (200) includes: an igniter (6) and a gas-generating propellant (7); the igniter (6) is disposed in the head or central hole of the oxygen-generating propellant column (200); The oxygen-generating column (200) is provided with a central through hole for guiding airflow.

2. The oxygen generator with a centrally located propellant column according to claim 1, characterized in that, The impact ignition mechanism (100) includes: a starter pin (1), a spring (11), an impactor (2), and a spark cap (4); Before the impact ignition mechanism (100) is working, the starting pin (1) is inserted into the impactor (2) to fix and limit it, and the spring (11) is in a compressed state. When the impact ignition mechanism (100) is working, the starting pin (1) is pulled out, the spring (11) releases its compressed internal energy, the impactor (2) moves under the action of the spring (11) and impacts the flame cap (4). The agent inside the flame cap (4) is burned after being impacted, and a high-temperature flame can be generated during combustion.

3. The oxygen generator with a centrally located propellant column according to claim 1, characterized in that, The heat insulation material (9) is made of high temperature resistant and low thermal conductivity material, used to isolate the heat generated by the oxygen-generating column (200) from being transferred to the external environment.

4. The oxygen generator with a centrally located propellant column according to claim 1, characterized in that, The support bowl (12) is provided with heat-insulating inner cylinder airflow holes around its periphery and center, so that the gas produced by the oxygen-generating column (200) can flow into the gas purification material (13) through the heat-insulating inner cylinder airflow holes.

5. The oxygen generator with a centrally located propellant column according to claim 1, characterized in that, The bottom of the heat-insulating inner cylinder (10) is provided with an airflow hole (10a) so that the gas generated by the oxygen-generating column (200) flows out through the airflow hole of the heat-insulating inner cylinder.

6. The oxygen generator with a centrally located propellant column according to claim 1, characterized in that, The heat insulation material (9) is wrapped around the oxygen-generating column (200) or inside the central hole. It is a high-temperature resistant material with low thermal conductivity and is used to reduce the heat generated by the oxygen-generating column (200) from being transferred to the external environment.

7. The oxygen generator with a centrally located propellant column according to claim 6, characterized in that, The heat insulation material (9) is ceramic fiber cotton.

8. The oxygen generator with a centrally located propellant column according to claim 1, characterized in that, When the internal gas pressure of the oxygen generator is greater than the opening pressure of the safety valve (300), the safety valve (300) opens and the gas is discharged from the safety valve (300); when the internal gas pressure of the oxygen generator is lower than the opening pressure of the safety valve (300), the safety valve (300) closes and the gas cannot be discharged from the safety valve (300).

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