Modular folding type self-rescue oxygen supply device for operation in closed space

Abstract

The invention discloses a modularized folding type self-rescue oxygen supply device for operation in a closed space, and relates to the technical field of self-rescue oxygen supply. The device comprises a wearable back splint, a modular assembly process is adopted, and a consumable module can be independently prefabricated and replaced: when a calcium peroxide system is assembled, double-layer coated calcium peroxide particles are loaded into a solid bin, a citric acid aqueous solution is packaged into an auxiliary bin under vacuum negative pressure, and a 0.05 mm aluminum foil heat preservation layer is additionally arranged on the outer side of a liquid bin; when the sodium percarbonate system is assembled, the solid bin is filled with sodium percarbonate particles, the auxiliary bin packages powder, and the solid bin and the auxiliary bin are independently sealed. All layers of the composite filter element are stacked and packaged in sequence, and the filter pipe is hermetically connected with the mixed breathing bin; folding marks are prefabricated on the folding air bag according to a Mipu paper folding process, and the folding air bag is connected with the reaction bin one-way valve through buckles; the pull rope of the trigger control module is linked with the buckle type isolation plate, the sensor and the alarm are integrated according to needs, the sensor and the alarm are integrally packaged into the shell after being assembled, the protective cover is buckled and fixed, no complex technology is needed in the whole process, and the manufacturing cost is controllable.

Description

Technical Field

[0001] This invention relates to the field of self-rescue oxygen supply equipment technology, specifically to a modular foldable self-rescue oxygen supply device for operation in enclosed spaces. Background Technology

[0002] Working environments such as deep pits, enclosed containers, and inside equipment typically present challenges including poor air circulation, accumulation of toxic gases like carbon monoxide and hydrogen sulfide, and low oxygen concentrations. These environments are often characterized by confined spaces, flammability, and difficulties in external rescue, greatly increasing the risk of asphyxiation and poisoning accidents for workers. Existing self-rescue oxygen supply equipment is ill-suited for these complex scenarios: traditional oxygen cylinders weigh ≥4kg, making them cumbersome to carry, costly to use and maintain, and posing a fire-supporting risk with pure oxygen output, making them unsuitable for flammable environments; conventional oxygen generators are bulky, power-dependent, and have stringent environmental requirements, making them unsuitable for deployment in confined spaces; sodium percarbonate oxygen systems require premixed catalysts, which are prone to premature decomposition and failure at high temperatures, resulting in poor structural stability; and hydrogen peroxide oxygen systems are prone to leakage and corrosion, posing insufficient safety. None of these devices can meet the core need of workers to quickly obtain safe breathing air when experiencing initial discomfort such as dizziness, nausea, and weakness in the limbs.

[0003] While existing technologies utilize origami structures for gas storage, they lack integration with oxygen generation, filtration, mixing, and breathing functions, and also lack modular design and compatibility with multiple oxygen generation systems. Furthermore, they lack systematic solutions to key pain points such as initial discomfort for operators, difficulty in precise oxygen concentration control to prevent combustion, toxic gas filtration, and sensor alarms. Therefore, there is an urgent need for a lightweight, foldable, simple, low-cost, safe, non-toxic, and multi-scenario adaptable modular self-rescue oxygen supply device to fill this technological gap. Summary of the Invention

[0004] The purpose of this invention is to provide a modular, foldable, self-rescue oxygen supply device for working in confined spaces to solve the above problems.

[0005] To achieve the above objectives, the present invention specifically adopts the following technical solution: A modular foldable self-rescue oxygen supply device for confined space operations includes a wearable back clip, one side of which is provided with an outer shell, and the interior of the outer shell is provided with an oxygen generation module, a filter-mixed breathing integrated module, a foldable airbag module and a trigger control module. The oxygen generation module includes a solid chamber, an auxiliary chamber, and a reaction chamber that are fixedly installed on the inner wall of the outer shell; The integrated filtration and mixing breathing module includes a filter tube, a mixing chamber, and a positive pressure one-way breathing valve. The filter tube is filled with a composite filter element. The mixing chamber controls the mixing ratio of oxygen and filtered air to 1:4 through structural design, and only supplies air when triggered by negative inhalation pressure. The folded airbag module includes a folded airbag fixedly installed on the inner wall of the outer shell. A pressure safety valve is fixedly installed on one side of the folded airbag, and a one-way valve is fixedly connected to the reaction chamber on one side of the folded airbag. The trigger control module includes a pull line and a pressing component on one side of the outer shell. The pull line is specifically an anti-slip pull rope. The trigger control module unlocks the dual isolation structure and triggers the oxygen generation reaction through a dual-start method.

[0006] Furthermore, the outer shell is made of environmentally friendly flame-retardant material, with Velcro and detachable hooks on the back, a protective cover to prevent misuse on the outside, waterproof sealing strips on the edges, and an additional heat insulation layer on the inside corresponding to the raw material storage area. It adopts a snap-on modular design.

[0007] Furthermore, the solid container and auxiliary container are adaptable to calcium peroxide + weak acid, sodium percarbonate + Two oxygen production systems are provided, with a dual-channel isolation structure between the two chambers. The reaction chamber is connected to the two chambers, and a one-way exhaust valve is installed at the top. The oxygen production rate is optimized and controlled by the connecting orifice.

[0008] Furthermore, the folding airbag is designed using Miura Origami technology, and is made of flame-retardant polyimide film with pre-set creases. In the compressed state, it fits the inner wall of the outer shell, unfolds within 3 seconds after inflation, and is detachably connected to the outer shell.

[0009] Furthermore, the outer shell is made of glass fiber reinforced flame-retardant polyurethane material, with Velcro on the back, a protective cover and operation markings on the outside to prevent misuse, waterproof sealing strips on the edges, and a vacuum heat insulation microcavity layer added to the inner side corresponding to the raw material storage area.

[0010] Furthermore, the solid chamber is filled with coated calcium peroxide particles, the liquid chamber is vacuum-sealed with citric acid aqueous solution, a double-channel isolation structure is provided between the two chambers, the reaction chamber is connected to the two chambers, and a one-way exhaust valve is provided at the top.

[0011] Furthermore, when the oxygen generation module is adapted to a calcium peroxide system, the solid chamber is filled with 80g of coated calcium peroxide particles with a particle size of 3-4mm, using a double-layer coating of stearic acid and hydrophobic silica, with a coating ratio of 3%-5%, a purity of ≥98%, and a moisture content of ≤0.3%. When adapted to a sodium percarbonate system, the solid chamber is filled with 50g of sodium percarbonate particles with a particle size of 2-3mm and a purity of ≥98%, and the auxiliary chamber is encapsulated with 10g of MnO2. The powder has a purity of ≥95%, and the solid chamber contains an independently packaged molecular sieve desiccant packet.

[0012] Furthermore, when the oxygen generation module is adapted to a calcium peroxide system, the auxiliary chamber has a flat microcavity structure. In standard scenarios, it encapsulates 50ml of a 2% food-grade citric acid aqueous solution, which can be finely adjusted to 55ml in low-temperature / high-humidity scenarios. The citric acid purity is ≥99.5%, and the solvent is pure water with a conductivity ≤10μS / cm. An aluminum foil insulation layer is added to the outside. When adapted to a sodium percarbonate system, the auxiliary chamber encapsulates 30ml of pure water. The powder is separated into compartments, and the dual-channel isolation structure consists of a 0.08mm PET / aluminum foil composite sealing film and a snap-on isolation plate. The pull rope tension of the pull-to-start component is ≤5N, and the pressing pressure of the squeeze-to-start component is ≤8N.

[0013] Furthermore, the composite filter element is composed of an activated carbon layer, a carbon monoxide oxidation catalyst layer, a hydrogen sulfide adsorption layer, and a high-efficiency filter screen stacked sequentially, with each layer having a thickness of 5mm. It can filter more than 95% of carbon monoxide and hydrogen sulfide with a concentration of ≤1000ppm. The mixing chamber has a volume of 80ml and is equipped with an airflow turbulence plate. The mixing ratio of oxygen to filtered air is 1:4, and the oxygen concentration of the output gas is stable at 21%-23%.

[0014] Furthermore, the folding airbag, in its compressed state, fits against the inner wall of the outer shell and unfolds within 3 seconds after inflation, with a volume of 1.2L and a pressure safety valve opening pressure of 0.12MPa. A high-temperature resistant foam pad is added to the outside of the folding airbag. The overall dimensions of the device are 15cm×10cm×2cm, the weight is ≤140g, the moisture resistance rating is IP64, the applicable temperature range is 5~55℃, and the shelf life is ≥12 months. The sensor detection thresholds are carbon monoxide ≥50ppm, hydrogen sulfide ≥10ppm, or oxygen concentration ≤18%, the alarm volume is ≥80dB, and the luminous intensity is ≥200cd / m². The outer shell, folding airbag, and filter tube are detachable and reusable, and the consumable module can be replaced separately.

[0015] The beneficial effects of this invention are as follows: 1. This invention adopts a modular assembly process, and consumable modules can be prefabricated and replaced individually: When assembling the calcium peroxide system, double-layered coated calcium peroxide particles are loaded into the solid chamber, and citric acid aqueous solution is vacuum-sealed into the auxiliary chamber. A 0.05mm aluminum foil insulation layer is added to the outside of the liquid chamber. When assembling the sodium percarbonate system, the solid chamber is filled with sodium percarbonate particles, and the auxiliary chamber is sealed. The powder and the two are sealed independently. The composite filter element is stacked and packaged in sequence, and the filter tube is sealed to the mixing breathing chamber; the folded airbag is pre-made with creases according to the Miura origami process and is connected to the one-way valve of the reaction chamber by buckles; the pull rope of the trigger control module is linked with the buckle-type isolation plate, and the sensors and alarms are integrated as needed. After assembly, the whole is packaged into the shell and the protective cover is fixed by buckles. No complicated process is required throughout the process, and the manufacturing cost is controllable.

[0016] 2. This invention features a modular design that supports the replacement of two oxygen generation systems, making it suitable for confined space operations in various industries such as power, oil and gas, and mining. It addresses the needs of different scenarios, including deep pits and internal equipment maintenance. The overall weight is ≤140g, and the compressed paper-like airbag allows for easy attachment / suspension and carrying without adding to the workload. The mixed oxygen supply controls the oxygen concentration at 21%-23%, eliminating the risk of combustion. The product is non-toxic and non-corrosive. The composite filter efficiently filters toxic gases, and the double-seal design prevents accidental triggering. The dual-start mode adapts to initial discomfort conditions, and a single person can operate it independently. Operation is quick, with a startup response time of ≤1 second and airbag deployment within 3 seconds. The oxygen production rate is controllable, and oxygen supply stops when breathing ceases. It is energy-efficient and safe, using inexpensive and environmentally friendly materials, and has a simple structure that is easy to mass-produce. The modular design allows for the reuse of components such as the shell and airbag, and the convenient replacement of consumable modules, reducing operating costs. The waterproof and flame-retardant shell and high-temperature resistant oxygen production system can cope with complex environments such as humidity, flammability, and high temperatures. Optional sensor alarms can be added, which can provide workers with more than 10 minutes of self-rescue time in scenarios where external rescue is difficult, significantly reducing the risk of accidents. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall device of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall device of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the overall device of the present invention. Figure 3 ; Figure 4 This is the present invention. Figure 3 Schematic diagram at point A in the middle.

[0018] Reference numerals: 1. Wearing back clip; 2. Outer shell; 3. Oxygen generation module; 31. Solid chamber; 32. Auxiliary chamber; 33. Reaction chamber; 4. Integrated filtration and mixing breathing module; 41. Filter tube; 42. Mixing chamber; 43. Positive pressure one-way breathing valve; 5. Folding airbag module; 51. Folding airbag; 52. Pressure safety valve; 53. One-way valve; 6. Trigger control module; 61. Pull cord. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0020] A modular foldable self-rescue oxygen supply device for confined space operations according to a preferred embodiment of the present invention will be described in detail below.

[0021] Example 1, as Figures 1-4As shown, it includes a wearable back clip 1, a shell 2 on one side of the wearable back clip 1, and an oxygen generation module 3, a filter-mixed breathing integrated module 4, a folding airbag module 5 and a trigger control module 6 inside the shell 2. The oxygen generation module 3 includes a solid chamber 31, an auxiliary chamber 32, and a reaction chamber 33, which are fixedly installed on the inner wall of the outer shell 2. The integrated filter-mixing breathing module 4 includes a filter tube 41, a mixing chamber 42, and a positive pressure one-way breathing valve 43. The filter tube 41 is filled with a composite filter element. The mixing chamber 42 controls the mixing ratio of oxygen and filtered air to 1:4 through structural design. It only opens the air supply when the inhalation negative pressure is triggered. The folded airbag module 5 includes a folded airbag 51 fixedly installed on the inner wall of the outer shell 2. A pressure safety valve 52 is fixedly installed on one side of the folded airbag 51. One side of the folded airbag 51 is fixedly connected to the reaction chamber 33 by a one-way valve 53. The trigger control module 6 includes a pull line 61 and a pressing component set on one side of the outer shell 2. The pull line 61 is a non-slip pull rope. The trigger control module 6 unlocks the dual isolation structure and triggers the oxygen generation reaction through a dual-start method. First, put on the back clip 1. Then, in standby mode, the device is in a flat and compressed state. It is attached to the chest of the operator by Velcro. All modules are sealed, the folded airbag 51 is compressed, and the solid chamber 31 and the liquid chamber are isolated by two channels. No gas is generated. It can be stably stored for ≥12 months in an environment of 5~55℃ and RH 30%~80%. Start-up phase: When the operator experiences dizziness, weakness or other abnormalities, the protective cover is lifted and the machine is started by pulling the cable 61 or by squeezing. The snap-on isolation plate is unlocked, the sealing film breaks, and the citric acid aqueous solution flows into the solid silo 31, where it reacts with calcium peroxide to generate oxygen. Oxygen supply stage: Oxygen enters the folded airbag 51 through the one-way valve 53, and the folded airbag 51 quickly unfolds; the operator inhales by holding the mouthpiece, the one-way breathing valve 43 opens, and the oxygen in the airbag and the outside air filtered by the composite filter enter the mixing chamber 42 simultaneously. After thorough mixing, the oxygen concentration of 21%-23% is inhaled into the human body; when exhaling, the one-way breathing valve 43 closes, the exhaled gas is discharged to the outside, and the oxygen is temporarily stored in the folded airbag 51. Stopping phase: The reaction lasts for 10-11 minutes. After the citric acid solution has completely reacted, oxygen production will automatically stop. The remaining gas in the folded airbag 51 can sustain breathing for 1-2 minutes. After the workers have completed calling for help and evacuating, the device is discarded and is for single use only. Using a modular assembly process, consumable modules can be prefabricated and replaced individually: For the calcium peroxide system, double-layered calcium peroxide granules are loaded into the solid chamber 31, and a citric acid aqueous solution is vacuum-sealed into the auxiliary chamber 32. A 0.05mm aluminum foil insulation layer is added to the outside of the liquid chamber. For the sodium percarbonate system, the solid chamber 31 is filled with sodium percarbonate granules, and the auxiliary chamber 32 is sealed. The powder and the two are sealed independently. The composite filter element is stacked and packaged in sequence, and the filter tube 41 is sealed to the mixing breathing chamber; the folded airbag 51 is pre-made with folds according to the Miura origami process and is connected to the one-way valve 53 of the reaction chamber 33 through a buckle; the pull rope of the trigger control module 6 is linked with the buckle-type isolation plate, and the sensor and alarm are integrated as needed. After assembly, the whole is packaged into the shell 2 and the protective cover is fixed by buckle. No complicated process is required throughout the process and the manufacturing cost is controllable.

[0022] Example 2, as Figures 1-4 As shown, the outer shell 2 is made of environmentally friendly flame-retardant material, with Velcro and detachable hooks on the back, a protective cover to prevent misuse on the outside, waterproof sealing strips on the edges, and an additional heat insulation layer on the inside corresponding to the raw material storage area. It adopts a snap-on modular design, and the solid storage compartment 31 and auxiliary compartment 32 are compatible with calcium peroxide + weak acid, sodium percarbonate +... Two oxygen production systems are provided, with a dual-channel isolation structure between the two chambers. The reaction chamber 33 is connected to the two chambers, and a one-way exhaust valve is installed at the top. The oxygen production rate is optimized and controlled by the connecting orifice.

[0023] Example 3, as Figures 1-4 As shown, the folding airbag 51 is designed using Miura Origami technology and is made of flame-retardant polyimide film. It has pre-set creases, fits the inner wall of the outer shell 2 in the compressed state, and unfolds within 3 seconds after inflation. It is detachably connected to the outer shell 2. The outer shell 2 is made of glass fiber reinforced flame-retardant polyurethane material, with Velcro on the back, a protective cover and operation markings on the outside, and waterproof sealing strips on the edges. A vacuum heat insulation microcavity layer is added to the inner side corresponding to the raw material compartment area. The solid compartment 31 is filled with coated calcium peroxide particles, and the liquid compartment is vacuum-sealed with citric acid aqueous solution. A double isolation structure is set between the two compartments. The reaction compartment 33 is connected to the two compartments, and a one-way exhaust valve is set on the top.

[0024] Example 4, as Figures 1-4 As shown, when the oxygen generation module 3 is adapted to the calcium peroxide system, the solid chamber 31 is filled with 80g of coated calcium peroxide particles with a particle size of 3-4mm. The particles are coated with a double layer of stearic acid and hydrophobic silica, with a coating ratio of 3%-5%, a purity ≥98%, and a moisture content ≤0.3%. When adapted to the sodium percarbonate system, the solid chamber 31 is filled with 50g of sodium percarbonate particles with a particle size of 2-3mm and a purity ≥98%. The auxiliary chamber 32 contains 10g of... The powder has a purity ≥95%. Solid chamber 31 contains an independently packaged molecular sieve desiccant packet. When the oxygen generation module 3 is adapted to a calcium peroxide system, auxiliary chamber 32 has a flat microcavity structure, typically containing 50ml of 2% food-grade citric acid aqueous solution. In low-temperature / high-humidity scenarios, this can be adjusted to 55ml. The citric acid purity is ≥99.5%, and the solvent is pure water with a conductivity ≤10μS / cm. An aluminum foil insulation layer is added to the outside. When adapted to a sodium percarbonate system, auxiliary chamber 32 contains 30ml of pure water. The powder is separated into compartments, and the double-layer isolation structure consists of a 0.08mm PET / aluminum foil composite sealing film and a snap-on isolation plate. The pull rope tension of the pull-cord 61 start-up component is ≤5N, and the pressing pressure of the squeeze start-up component is ≤8N.

[0025] Example 5, as Figures 1-4 As shown, the composite filter element is composed of an activated carbon layer, a carbon monoxide oxidation catalyst layer, a hydrogen sulfide adsorption layer, and a high-efficiency filter screen stacked in sequence. Each layer is 5mm thick and can filter more than 95% of carbon monoxide and hydrogen sulfide with a concentration of ≤1000ppm. The mixing chamber has a volume of 80ml and a built-in airflow baffle. The mixing ratio of oxygen and filtered air is 1:4, and the oxygen concentration of the output gas is stable at 21%-23%.

[0026] Example 6, as Figures 1-4 As shown, the device includes a foldable airbag 51 that fits against the inner wall of the outer shell in a compressed state, and unfolds within 3 seconds after inflation, with a volume of 1.2L. The pressure safety valve 52 has an opening pressure of 0.12MPa. A high-temperature resistant foam pad is added to the outside of the foldable airbag 51. The overall dimensions of the device are 15cm×10cm×2cm, the weight is ≤140g, the moisture resistance rating is IP64, the applicable temperature range is 5~55℃, and the shelf life is ≥12 months. The sensor detection thresholds are carbon monoxide ≥50ppm, hydrogen sulfide ≥10ppm or oxygen concentration ≤18%, the alarm volume is ≥80dB, and the luminous intensity is ≥200cd / m². The outer shell 2, foldable airbag 51, and filter tube 41 are detachable and reusable, and the consumable module can be replaced separately.

[0027] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A modular foldable self-rescue oxygen supply device for confined space operations, comprising a wearable back clip (1), characterized in that, The wearable back clip (1) has a shell (2) on one side, and the shell (2) contains an oxygen generation module (3), a filter-mixed breathing integrated module (4), a folding airbag module (5) and a trigger control module (6). The oxygen generation module (3) includes a solid chamber (31), an auxiliary chamber (32) and a reaction chamber (33) that are fixedly installed on the inner wall of the outer shell (2). The integrated filter-mixing breathing module (4) includes a filter tube (41), a mixing chamber (42), and a positive pressure one-way breathing valve (43). The filter tube (41) is filled with a composite filter element. The mixing chamber (42) controls the mixing ratio of oxygen and filtered air to 1:4 through structural design. It only supplies air when the negative pressure of inhalation is triggered. The folded airbag module (5) includes a folded airbag (51) fixedly installed on the inner wall of the outer shell (2). A pressure safety valve (52) is fixedly installed on one side of the folded airbag (51). One side of the folded airbag (51) is fixedly connected to the reaction chamber (33) by a one-way valve (53). The trigger control module (6) includes a pull line (61) and a pressing component set on one side of the outer shell (2). The pull line (61) is specifically an anti-slip pull rope. The trigger control module (6) unlocks the dual isolation structure and triggers the oxygen generation reaction through a dual-start method.

2. The modular foldable self-rescue oxygen supply device for confined space operations according to claim 1, characterized in that, The outer shell (2) is made of environmentally friendly flame-retardant material. The back is equipped with Velcro and a detachable hook. The outer side is equipped with a protective cover to prevent misuse. The edge is equipped with a waterproof sealing strip. The inner side is equipped with a heat insulation layer corresponding to the raw material warehouse area. It adopts a snap-on modular design.

3. The modular foldable self-rescue oxygen supply device for confined space operations according to claim 1, characterized in that, The solid container (31) and auxiliary container (32) are compatible with calcium peroxide + weak acid, sodium percarbonate + Two oxygen production systems are provided, with a double-channel isolation structure between the two chambers. The reaction chamber (33) is connected to the two chambers, and a one-way exhaust valve is provided at the top. The oxygen production rate is optimized and controlled by the connecting orifice.

4. The modular folding self-rescue oxygen supply device for confined space operations according to claim 1, characterized in that, The folding airbag (51) is designed using Miura Origami technology. It is made of flame-retardant polyimide film with pre-set creases. In the compressed state, it fits the inner wall of the outer shell (2). After inflation, it unfolds within 3 seconds and is detachably connected to the outer shell (2).

5. A modular foldable self-rescue oxygen supply device for confined space operations according to claim 1, characterized in that, The outer shell (2) is made of glass fiber reinforced flame retardant polyurethane material, with Velcro on the back, a protective cover and operation markings on the outside, waterproof sealing strips on the edges, and a vacuum heat insulation microcavity layer added to the inner side corresponding to the raw material warehouse area.

6. A modular foldable self-rescue oxygen supply device for confined space operations according to claim 1, characterized in that, The solid chamber (31) is filled with coated calcium peroxide particles, the liquid chamber is vacuum-sealed with citric acid aqueous solution, a double isolation structure is provided between the two chambers, the reaction chamber is connected to the two chambers, and a one-way exhaust valve is provided at the top.

7. A modular foldable self-rescue oxygen supply device for confined space operations according to claim 1, characterized in that, When the oxygen generating module (3) is adapted to the calcium peroxide system, the solid chamber (31) is filled with 80g of coated calcium peroxide particles with a particle size of 3-4mm. The particles are coated with a double layer of "stearic acid + hydrophobic silica" with a coating ratio of 3%-5%, a purity of ≥98%, and a moisture content of ≤0.3%. When adapted to the sodium percarbonate system, the solid chamber (31) is filled with 50g of sodium percarbonate particles with a particle size of 2-3mm and a purity of ≥98%. 10g of sodium percarbonate is also encapsulated in the auxiliary chamber. The powder has a purity of ≥95%, and the solid container (31) contains an independently packaged molecular sieve desiccant pack.

8. A modular foldable self-rescue oxygen supply device for confined space operations according to claim 1, characterized in that, When the oxygen generating module (3) is adapted to the calcium peroxide system, the auxiliary chamber (32) has a flat microcavity structure. In a normal scenario, it encapsulates 50ml of 2% food-grade citric acid aqueous solution. In a low-temperature / high-humidity scenario, it can be finely adjusted to 55ml. The citric acid purity is ≥99.5%, and the solvent is pure water with a conductivity ≤10μS / cm. An aluminum foil insulation layer is added to the outside. When adapted to the sodium percarbonate system, the auxiliary chamber encapsulates 30ml of pure water. The powder is separated into compartments, and the dual-channel isolation structure consists of a 0.08mm PET / aluminum foil composite sealing film and a snap-on isolation plate. The pull rope tension of the pull-to-start component is ≤5N, and the pressing pressure of the squeeze-to-start component is ≤8N.

9. A modular foldable self-rescue oxygen supply device for confined space operations according to claim 1, characterized in that, The composite filter element is composed of an activated carbon layer, a carbon monoxide oxidation catalyst layer, a hydrogen sulfide adsorption layer, and a high-efficiency filter screen stacked in sequence. Each layer is 5mm thick and can filter more than 95% of carbon monoxide and hydrogen sulfide with a concentration of ≤1000ppm. The mixing chamber (42) has a volume of 80ml and is equipped with an airflow turbulence plate. The mixing ratio of oxygen and filtered air is 1:4, and the oxygen concentration of the output gas is stable at 21%-23%.

10. A modular, foldable, self-rescue oxygen supply device for confined space operations according to claim 1, characterized in that, The folding airbag (51) is compressed and fits against the inner wall of the outer shell. It unfolds within 3 seconds after inflation, with a volume of 1.2L and a pressure safety valve opening pressure of 0.12MPa. A high-temperature resistant foam pad is added to the outside of the folding airbag (51). The overall size of the device is 15cm×10cm×2cm, the weight is ≤140g, the moisture resistance rating is IP64, the applicable temperature range is 5~55℃, and the storage period is ≥12 months. The sensor detection threshold is carbon monoxide ≥50ppm, hydrogen sulfide ≥10ppm or oxygen concentration ≤18%, the alarm volume is ≥80dB, and the luminous intensity is ≥200cd / m². The outer shell, folding airbag, and filter tube can be disassembled and reused, and the consumable module can be replaced separately.

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