Double-mode oxygen supply oxygen respirator

Abstract

The invention discloses a dual-mode oxygen supply oxygen respirator which comprises an oxygen bottle set, a pressure reducer, a flow adjusting device, a parameter collector, an alarm, an oxygen mask, a breathing connecting set, an air bag set, an oxygen respirator protection structure body, a cleaning tank set, a cooler set, an exhaust valve set, a self-compensating valve set and a pull rod set. The oxygen bottle set reduces high-pressure oxygen to medium-pressure oxygen through the pressure reducer, the flow adjusting device achieves switching between a static sitting mode and a conventional working mode, and different oxygen consumption requirements are met. The air bag set maintains the positive pressure of 10-245Pa through the positive pressure mechanism, and the automatic supply mechanism dynamically responds to the oxygen consumption pressure change. The breathing connection set and the cleaning tank set ensure inspiration and expiration circulation and CO2 absorption, and the cooler set improves the breathing comfort degree. Through dual-mode oxygen supply, medium-pressure transmission, intelligent monitoring and chest integrated design, oxygen supply flexibility, safety, comfort and maintenance convenience are improved, and the intelligent oxygen supply system is suitable for fire fighting, rescue and other scenes.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of respiratory protection, and particularly relates to a dual-mode oxygen supply oxygen respirator, which is suitable for providing safe and reliable oxygen supply for users in hypoxic, toxic gas or harmful environments, and is particularly suitable for scenes with variable labor intensity such as rescue and emergency rescue. BACKGROUND

[0002] The oxygen respirator is a key protective equipment for hypoxic or harmful environments, and is widely used in fields such as fire fighting, mine operation, emergency rescue and military operations. Its main function is to provide continuous and safe oxygen for the user through the oxygen supply system to meet the breathing demand. The oxygen supply mode of the traditional oxygen respirator includes three kinds of constant flow quantitative oxygen supply, automatic supply oxygen and manual supply oxygen, which ensures the stability of the gas flow during wearing. The constant flow oxygen supply mode usually presets the flow before wearing, for example, 1.5-1.8 L / min, which comprehensively considers the oxygen consumption law and breathing frequency under moderate labor intensity, can meet the basic ventilation demand, and at the same time avoid gas waste or oxygen deficiency. This mode maintains the flow stability through pressure stabilizing or self-adaptive mechanism, reduces the respiratory resistance, and improves the comfort, which is suitable for moderate physical labor. However, the constant flow mode cannot dynamically adapt to the change of labor intensity, which may cause oxygen waste during low-intensity activities (such as sitting still), and may not provide enough oxygen during high-intensity activities, which limits its applicability.

[0003] To solve this problem, some oxygen respirators use a dual-mode oxygen supply mode for in-process adjustment, which allows the user to adjust the oxygen flow according to the real-time physiological state or labor intensity. For example, when sitting still or working at low intensity, the flow can be adjusted to about 0.5 L / min to reduce oxygen consumption and improve gas utilization efficiency; when working at moderate or above intensity, the flow can be adjusted to 1.5 L / min or above to meet the high metabolic demand. This mode significantly improves flexibility and endurance, and is particularly suitable for scenes with variable intensity such as rescue. However, the existing dual-mode oxygen supply system has the following disadvantages: first, the traditional design usually uses high-pressure pipelines to transport oxygen, which has the risk of leakage or rupture, especially in complex environments, which is easily affected by mechanical impact or high temperature. Second, the flow regulating device and pressure monitoring component are usually arranged separately, which increases the weight of the equipment and causes uneven weight distribution, affecting the comfort of long-time wearing. In addition, the existing system relies on wired connection for pressure monitoring, which limits the real-time performance and mobility, and the pipeline layout is complex, which is easy to be tangled or worn, affecting the appearance and maintenance convenience. The design of the gas purification and cooling system is not optimized, which may cause incomplete CO2 absorption or heat accumulation, reducing the breathing comfort.

[0004] Traditional oxygen respirators face a challenge in balancing performance and load during oxygen supply cycles. A single constant-flow mode offers poor adaptability, while a dual-mode mode, though flexible, often requires additional components, increasing size and weight and hindering mobile use. Parameter monitoring relies on wired transmission, making intelligent management difficult, and cluttered piping layouts affect durability. These issues limit the equipment's application in complex environments (such as firefighting and mining), necessitating a solution that balances oxygen supply flexibility, safety, comfort, and intelligence. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to solve the above problems and provide an oxygen respirator with dual-mode oxygen supply.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A dual-mode oxygen respirator, comprising:

[0008] Oxygen cylinder assembly, serving as a high-pressure oxygen source;

[0009] A pressure reducer, connected to the oxygen cylinder group via an oxygen cylinder valve, is used to reduce high-pressure oxygen to medium-pressure oxygen.

[0010] The flow regulating device is worn on the user's chest and connected to the pressure reducer via a flexible medium-pressure air supply pipeline. It is equipped with a flow regulating mechanism for switching between at least two preset oxygen supply flow modes, including a sitting mode flow of not less than 0.5L / min and a normal working mode flow of 1.5 to 1.8L / min.

[0011] A parameter acquisition unit, connected to the pressure reducer, is used to collect pressure data within the oxygen cylinder group in real time.

[0012] An alarm, integrated into the flow regulating device, is used to receive pressure data collected by the parameter collector and display it in real time.

[0013] An oxygen mask is in contact with the user and is used to inhale oxygen and exhale gas.

[0014] A breathing connection assembly, connected to the flow regulating device and oxygen mask, is used to control the inhalation and exhalation cycles;

[0015] The airbag assembly is connected to the breathing connection assembly, maintains a positive pressure state through a positive pressure mechanism, and is connected to the pressure reducer through an automatic replenishment mechanism to automatically replenish oxygen when oxygen consumption increases.

[0016] The oxygen respirator protective structure serves as a mounting device to house the oxygen cylinder assembly, pressure reducer, flow regulator, and medium-pressure gas supply pipeline.

[0017] The pressure resistance of the medium-pressure gas supply pipeline is 1-2.5 MPa, and the medium-pressure gas is delivered from the pressure reducer to the flow regulating device and the breathing connection group.

[0018] Further, the flow regulating device comprises a body, a regulating valve group and a flow regulating nut. The regulating valve group is built in the body and communicates with the medium-pressure gas supply pipeline. The flow regulating nut is an external regulating mechanism, and the clockwise or counterclockwise rotation realizes the switching between the sitting mode flow ≥ 0.5 L / min and the conventional working mode flow 1.5-1.8 L / min.

[0019] Further, the regulating valve group is connected with the body through a regulating valve sealing ring, which ensures the air tightness of the flow regulating process.

[0020] Further, the medium-pressure gas supply pipeline comprises a flow input pipe and a flow output pipe. The flow input pipe and the flow output pipe are arranged in parallel outside the oxygen respirator protection structure and are integrated and packaged into a medium-pressure gas supply rubber composite pipe body through a common cladding layer by using a multi-layer composite pressure-resistant material.

[0021] Further, the flow input pipe and the flow output pipe are connected with the body of the flow regulating device through a flow gas supply pipe fastening screw. The flow input pipe communicates with the flow output connection device of the pressure reducer, and the flow output pipe communicates with the breathing connection group.

[0022] Further, the two ends of the flow input pipe and the flow output pipe are connected through a quick plug connector, which contains a copper joint to ensure the continuity of the electric conduction to meet the anti-static requirement.

[0023] Further, the pressure reducer comprises a high-pressure pipeline, two medium-pressure output pipelines and a manual supply button. The high-pressure pipeline is connected with the parameter collector to transmit high-pressure gas and collect pressure. One medium-pressure output pipeline is connected with the automatic supply mechanism, and the other medium-pressure output pipeline triggers additional oxygen supply through the manual supply button.

[0024] Further, the parameter collector is built-in a wireless communication module, which sends the collected pressure data to the alarm through wireless communication. The alarm comprises a processing unit and a display unit to display the pressure data in real time and trigger an abnormal alarm.

[0025] Further, the alarm is an electronic alarm, which is fixed to the body of the flow regulating device through an electronic alarm fastening screw and is wirelessly connected with the parameter collector.

[0026] Further, the positive pressure mechanism comprises a positive pressure spring and a positive pressure plate. The positive pressure spring acts on the positive pressure plate to maintain the pressure in the air bag group in the range of 10-245 Pa.

[0027] Further, the automatic supply mechanism comprises a self-supply valve group connected with one medium-pressure output pipeline of the pressure reducer, for automatically supplying oxygen to the air bag group when the oxygen consumption increases.

[0028] Further, it further comprises a pull rod group connected with the air bag group and the self-supply valve group, and the self-supply valve group is triggered to open the supply when the air bag pressure is lower than a threshold value.

[0029] Further, it further comprises an exhaust valve group connected with the air bag group, and the exhaust valve group is automatically opened when the air bag pressure rises to 400-600 Pa.

[0030] Further, it further comprises a cooler group connected with the flow output pipeline of the medium-pressure gas supply pipeline through a flow input connection device, for cooling the medium-pressure oxygen and delivering the cooled medium-pressure oxygen to the oxygen mask through the breathing connection group.

[0031] Further, it further comprises a clean tank group connected with the breathing connection group and the air bag group, for absorbing CO2 in the exhaled gas and recycling the purified gas to the air bag group.

[0032] Further, the breathing connection group comprises an inhalation hose, an inhalation valve, a breathing tee, an exhalation valve and an exhalation hose, the inhalation hose is connected with the flow regulating device and the inhalation valve, and the inhalation hose delivers the medium-pressure oxygen to the oxygen mask, the exhalation hose is connected with the exhalation valve and the clean tank group, and the exhalation hose delivers the exhaled gas for CO2 absorption, and the breathing tee is connected with the inhalation valve, the exhalation valve and the oxygen mask, and the breathing tee controls the flow directions of inhalation and exhalation.

[0033] Further, the flow regulating device further comprises a chest-integrated control display unit, and the chest-integrated control display unit comprises:

[0034] a machine body, which is worn on the chest of a user through an adjustable binding belt or a magnetic attraction fixing structure;

[0035] a medium-pressure oxygen inlet and a medium-pressure oxygen outlet, which are arranged on the machine body and connected with a medium-pressure gas supply pipeline; the flow regulating valve group is arranged in the machine body and connected with the medium-pressure oxygen inlet and the medium-pressure oxygen outlet;

[0036] an electronic display alarm, which is fixed on the machine body and internally arranged with a wireless communication module and a display screen, and is used for receiving pressure data of the parameter collector and displaying the pressure data.

[0037] The present application has the following beneficial effects:

[0038] 1. Improve oxygen supply flexibility: The flow regulating device supports the switch between the sitting mode (≥ 0.5 L / min) and the regular working mode (1.5-1.8 L / min), accurately matching the user's oxygen consumption from low to high intensity. Compared with the traditional constant flow mode, the sitting mode reduces gas waste and prolongs the endurance time; the regular working mode ensures sufficient oxygen supply under high-intensity work, especially suitable for fire fighting, rescue and other scenes. The clockwise or counterclockwise rotation operation of the flow regulating screw nut is simple, combined with the air-tight design of the adjusting valve seal ring, to ensure the reliability of the switching process and improve the human-computer interaction experience.

[0039] 2. Enhance safety: The medium-pressure gas supply pipeline (pressure strength 1-2.5 MPa) uses multi-layer composite pressure-resistant material, combined with quick connector and copper metal joint, instead of traditional high-pressure pipeline, significantly reducing the risk of leakage and rupture. The copper metal joint meets the anti-static requirement, preventing safety hazards caused by static electricity accumulation. The parameter collector transmits pressure data to the alarm in real time through wireless communication (such as Bluetooth), and the display unit provides high-precision digital display, triggering an alarm when abnormal, allowing the user to respond in time to ensure the safety of oxygen supply in complex environments.

[0040] 3. Optimize wearing comfort: The flow regulating device and alarm are integrated in front of the chest, optimizing weight distribution through adjustable straps or magnetic fixation structure, reducing shoulder burden, suitable for long-term wear. The flow input pipe and output pipe of the medium-pressure gas supply pipeline are arranged in parallel and packaged as a composite pipe body, reducing entanglement and external wear, improving aesthetics and durability. Flexible pipeline design further reduces equipment rigidity, improving comfort in mobile scenarios.

[0041] 4. Improve intelligent level: Wireless communication between the parameter collector and the alarm replaces traditional wired connection, eliminating cable restrictions and improving mobility. The processing unit and display unit of the alarm present pressure data in real time, automatically alarming when abnormal, enhancing the intelligent management capability of the equipment, allowing the user to master the oxygen cylinder status without frequent checking.

[0042] 5. Ensure respiratory cycle efficiency: The oxygen mask and breathing connection group (including inhalation hose, inhalation valve, breathing tee, exhalation valve, exhalation hose) form an efficient inhalation and exhalation cycle. The airbag group maintains a positive pressure state (10-245 Pa) through a positive spring and a positive plate to prevent external harmful gases from entering. The automatic replenishment mechanism (self-replenishment valve group) and the pull rod group dynamically respond to oxygen consumption changes, combined with the manual replenishment button, providing flexible oxygen supply adjustment to adapt to changing scenarios.

[0043] 6. Enhanced maintenance convenience: The quick connector enables quick sealing, plugging, disassembling and maintenance of the pipeline, simplifies the process, effectively absorbs CO2 in the clean tank group, and reduces the gas temperature in the cooler group to improve the breathing comfort. Integrated design reduces the number of components, reduces maintenance complexity, and ensures the durability of the equipment in diverse environments (such as high temperature and humidity).

[0044] In summary, the present application significantly improves the oxygen supply efficiency, safety, comfort and applicability by dual-mode oxygen supply, medium-pressure pipeline, chest integration and intelligent monitoring, providing an innovative solution for respiratory protection technology.

[0045] Other advantages, objects, and features of the present application will be apparent to those skilled in the art from the following specification, and it is intended to be covered by the following claims. The objects and other advantages of the present application can be achieved and obtained by the following specification. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to make the purposes, technical solutions and advantages of the present application clearer, the preferred detailed description of the present application will be combined with the drawings as follows, wherein:

[0047] Fig. 1 The overall structure of the dual-mode oxygen supply oxygen respirator in the present application is shown in the figure.

[0048] Fig. 2 The structure of the flow regulating and pressure alarm device is shown in the figure.

[0049] Fig. 3 The structure of the breathing connection group is shown in the figure.

[0050] Fig. 4 The connection diagram of the pressure reducer is shown in the figure.

[0051] Reference numerals: 1 - oxygen respirator protection structure; 2 - oxygen cylinder group; 3 - air bag group; 4 - positive pressure spring; 5 - exhaust valve group; 6 - self-supply valve group; 7 - cleaning tank group; 8 - pull rod group; 9 - flow regulating device; 9.1 - electronic alarm; 9.2 - electronic alarm fastening screw; 9.3 - regulating valve group; 9.3.1 - flow regulating nut; 9.4 - regulating valve sealing ring; 9.5 - machine body; 9.6 - flow supply pipe fastening screw; 9.7 - medium pressure supply pipeline; 9.7.1 - cladding layer; 9.7.2 - flow input pipe; 9.7.3 - flow output pipe; 10 - oxygen mask; 11 - breathing connection group; 11.1 - inhalation hose; 11.2 - inhalation valve; 11.3 - breathing tee; 11.4 - exhalation valve; 11.5 - exhalation hose; 12 - cooler group; 12.1 - flow input connection device; 13 - high pressure pipe; 14 - parameter collector; 15 - pressure reducer; 15.1 - flow output connection device. DETAILED DESCRIPTION

[0052] Other advantages and effects of the present application can be easily understood by those skilled in the art from the description of the present application. The present application can also be implemented or applied by different specific embodiments, and various modifications or changes can be made to the details in the description based on different views and applications without departing from the spirit of the present application. It should be noted that the drawings provided in the following examples only illustrate the basic concept of the present application in a schematic manner, and the following examples and features in the examples can be combined with each other without conflict.

[0053] The drawings are only used for exemplary illustration, and the representation is only a schematic diagram, not a physical diagram, and should not be understood as a limitation on the present application. In order to better illustrate the embodiments of the present application, some components in the drawings may be omitted, enlarged or reduced, and do not represent the actual size of the product. It is understandable to those skilled in the art that some known structures and their descriptions in the drawings may be omitted.

[0054] The same or similar reference numerals in the drawings of the embodiments of the present application correspond to the same or similar components; in the description of the present application, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only used for exemplary illustration, and should not be understood as a limitation on the present application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0055] Example 1

[0056] As shown in Figs. 1-4 The core part of the dual-mode oxygen supply oxygen respirator provided by the embodiment mainly includes an oxygen cylinder group 2, a pressure reducer 15, a flow regulating device 9, a parameter collector 14, an electronic alarm 9.1, an oxygen mask 10, a breathing connection group 11, an airbag group 3, and an oxygen respirator protection structure 1. The auxiliary part of the system mainly includes a cleaning tank group 7, a cooler group 12, an exhaust valve group 5, a self-supply valve group 6, and a pull rod group 8.

[0057] The oxygen cylinder group 2 includes a high-pressure gas storage container and an oxygen cylinder valve, which is used to store high-pressure oxygen and control gas output, and is connected to the input port of the pressure reducer 15 through the oxygen cylinder valve.

[0058] The pressure reducer 15 includes a high-pressure pipeline 13, two medium-pressure output pipelines, a flow output connection device 15.1, and a manual supply button, which is used to reduce high-pressure oxygen to medium pressure (0.4-0.6 MPa), and is connected to the parameter collector 14 through the high-pressure pipeline 13, one medium-pressure output pipeline is connected to the self-supply valve group 6, and the other is connected to the flow output connection device 15.1 through the manual supply button.

[0059] The flow regulating device 9 includes a body 9.5, a regulating valve group 9.3, a flow regulating nut 9.3.1, a regulating valve sealing ring 9.4, an electronic alarm 9.1, and an electronic alarm fastening screw 9.2, which is used to regulate the flow of oxygen and display pressure data. The body 9.5 is fixed on the chest of the user through adjustable straps or magnetic attraction fixing structure; the regulating valve group 9.3 is built-in in the body 9.5 and communicates with the medium-pressure gas supply pipeline 9.7; the flow regulating nut 9.3.1 sets a limit gear to support the switching between the sitting mode (≥0.5 L / min) and the regular working mode (1.5-1.8 L / min); the regulating valve sealing ring 9.4 ensures the air tightness; and the electronic alarm 9.1 is fixed on the body 9.5 through the fastening screw 9.2.

[0060] The medium-pressure gas supply pipeline 9.7 includes a flow input pipe 9.7.2, a flow output pipe 9.7.3, and a cladding layer 9.7.1, which is used to transmit medium-pressure oxygen (0.4-0.6 MPa). The flow input pipe 9.7.2 and the flow output pipe 9.7.3 are arranged in parallel outside the oxygen respirator protection structure 1 and are integrated and packaged as a medium-pressure gas supply rubber composite pipe body through the cladding layer 9.7.1, which adopts multi-layer composite pressure-resistant material; the two ends are connected to the pressure reducer 15 and the breathing connection group 11 through quick plug connectors, and the connectors contain copper joints to meet the anti-static requirement; and the flow gas supply pipe fastening screw 9.6 fixes the pipeline to the body 9.5.

[0061] The parameter collector 14 includes a pressure sensor and a wireless communication module (not shown separately) for collecting pressure data of the oxygen cylinder group 2 in real time, connected with the pressure reducer 15 through the high-pressure pipe 13, and transmitting data to the electronic alarm 9.1 through Bluetooth.

[0062] The electronic alarm 9.1 includes a processing unit and a display unit for displaying pressure data and triggering an abnormal alarm, and is fixed to the body 9.5 through an electronic alarm fastening screw 9.2 and wirelessly communicates with the parameter collector 14.

[0063] The oxygen mask 10 includes a sealed mask and a connection interface for providing a channel for inhaling oxygen and exhaling gas, and connecting the inhalation hose 11.1 and the exhalation hose 11.5 through the breathing connection group 11 breathing tee 11.3.

[0064] The breathing connection group 11 includes an inhalation hose 11.1, an inhalation valve 11.2, a breathing tee 11.3, an exhalation valve 11.4, and an exhalation hose 11.5 for controlling inhalation and exhalation cycles. The inhalation hose 11.1 is connected to the flow regulating device 9 or the cooler group 12 and the inhalation valve 11.2; the exhalation hose 11.5 is connected to the exhalation valve 11.4 and the clean tank group 7; the breathing tee 11.3 is connected to the inhalation valve 11.2, the exhalation valve 11.4, and the oxygen mask 10.

[0065] The air bag group 3 includes an air bag body, a positive pressure plate, and a positive pressure spring 4 for storing purified gas and maintaining a positive pressure state (10-245 Pa), connected with the pull rod group 8 through the positive pressure spring 4 and the positive pressure plate, and in communication with the self-replenishing valve group 6 and the exhaust valve group 5.

[0066] The oxygen respirator protection structure 1 includes a fixing groove and a harness structure for accommodating the oxygen cylinder group 2, the pressure reducer 15, the flow regulating device 9, and the medium-pressure gas supply pipeline 9.7, and is made of lightweight high-strength materials.

[0067] The clean tank group 7 includes a chemical absorbent container for absorbing CO2 in exhaled gas, connected with the breathing connection group 11 through the exhalation hose 11.5, and in communication with the air bag group 3 at the output end.

[0068] The cooler group 12 includes a cooling medium and a heat exchange structure (not shown separately) for cooling medium-pressure oxygen, connected with the flow input connection device 12.1 and the flow output pipe 9.7.3, and in communication with the oxygen mask 10 at the output end through the inhalation hose 11.1.

[0069] The exhaust valve group 5 includes a one-way exhaust valve for automatically exhausting when the pressure of the air bag group 3 rises to 400-600 Pa, directly communicating with the air bag group 3, and the exhaust port being open to the external environment.

[0070] The self-supply valve group 6 includes a one-way valve and a trigger mechanism, which is used to automatically supply oxygen to the air bag group 3, and is connected with a medium pressure output pipeline of the pressure reducer 15 and the pull rod group 8.

[0071] The pull rod group 8 includes a pull rod and a linkage mechanism, which is used to trigger the self-supply valve group 6, and is mechanically connected with the positive pressure plate of the air bag group 3 and the self-supply valve group 6.

[0072] The chest integrated control display unit includes a body 9.5, a medium pressure oxygen inlet and outlet, a regulating valve group 9.3, a flow regulating nut 9.3.1 and an electronic alarm 9.1, which are used for integrated flow regulation and pressure display. The body 9.5 is fixed on the chest by an adjustable strap or a magnetic attraction fixing structure; the medium pressure oxygen inlet and outlet are connected with the flow input pipe 9.7.2 and the flow output pipe 9.7.3 through quick plug-in interfaces; the regulating valve group 9.3 is connected with the inlet and the outlet; and the electronic alarm 9.1 is internally provided with a wireless communication module and a display screen.

[0073] The integrated gas supply pipeline assembly includes a flow input pipe 9.7.2, a flow output pipe 9.7.3, a cladding layer 9.7.1 and a quick plug-in connection joint, which are used for transmitting medium pressure oxygen. The flow input pipe 9.7.2 and the flow output pipe 9.7.3 are integrated and packaged through the cladding layer 9.7.1, and the connection joint includes a self-locking mechanism and a conductive metal part.

[0074] The working process of the system is described in detail as follows:

[0075] 1. System starting and preparation stage

[0076] The user fixes the oxygen respirator protection structure 1 on the back by the shoulder strap, fixes the flow regulating device 9 on the chest by the adjustable strap or the magnetic attraction fixing structure, and attaches the oxygen mask 10 to the face. The oxygen cylinder valve of the oxygen cylinder group 2 is opened to ensure that the high pressure oxygen enters the pressure reducer 15. The parameter collector 14 and the electronic alarm 9.1 are started, a wireless communication connection is established, and it is confirmed that the pressure data display is normal.

[0077] 2. Pressure reduction and flow regulation stage

[0078] The pressure reducer 15 reduces the high pressure oxygen to medium pressure (0.4-0.6 MPa), and transmits it to the flow regulating device 9 through the flow output connecting device 15.1 and the flow input pipe 9.7.2. The user rotates the flow regulating nut 9.3.1 according to the labor intensity to select the sitting mode (≥0.5 L / min, suitable for low intensity activity) or the regular working mode (1.5-1.8 L / min, suitable for medium to high intensity operation). The regulating valve sealing ring 9.4 ensures the air tightness, and the flow gas supply pipe fastening screw 9.6 fixes the pipeline connection.

[0079] 3. Breathing cycle stage

[0080] The medium pressure oxygen enters the flow input connection device 12.1 of the cooler group 12 through the flow output pipe 9.7.3, is cooled, and then enters the breathing tee 11.3 through the inhalation hose 11.1 and the inhalation valve 11.2, is combined with the purified gas of the gas bag group 3, and is inhaled through the oxygen mask 10. When exhaling, the exhaled gas enters the clean tank group 7 through the breathing tee 11.3, the exhalation valve 11.4 and the exhalation hose 11.5, the CO2 is absorbed, and the purified gas is recycled to the gas bag group 3. The inhalation valve 11.2 and the exhalation valve 11.4 ensure one-way gas flow.

[0081] 4. Pressure monitoring stage

[0082] The pressure data of the oxygen cylinder group 2 is collected by the parameter collector 14 through the high-pressure pipe 13 in real time, and is transmitted to the electronic alarm 9.1 through Bluetooth. The display unit of the electronic alarm 9.1 presents the pressure value, and triggers the sound and light alarm when the pressure exceeds the safety range, prompting the user to check the oxygen cylinder group 2 or the pressure reducer 15.

[0083] 5. Positive pressure and supply stage

[0084] The gas bag group 3 maintains a positive pressure state (10-245 Pa) through the positive pressure spring 4 and the positive pressure plate, preventing external harmful gas from entering. When the oxygen consumption increases and the gas bag pressure is lower than the threshold value, the pull rod group 8 triggers the self-supply valve group 6 to supply oxygen from one medium pressure output pipe of the pressure reducer 15. When the gas bag pressure rises to 400-600 Pa, the exhaust valve group 5 is automatically opened to exhaust excess gas. In high-intensity work, the user can trigger the other medium pressure output pipe of the pressure reducer 15 through the manual supply button to supplement additional oxygen.

[0085] 6. Maintenance stage

[0086] After use, the oxygen cylinder valve of the oxygen cylinder group 2 is closed, and the oxygen mask 10 and the flow adjustment device 9 are removed. The quick plug connector of the medium pressure gas supply pipe 9.7 supports quick disassembly and assembly, and the metal copper joint ensures anti-static performance. The clean tank group 7 and the cooler group 12 can be regularly replaced with absorbent and cooling medium to ensure long-term use effect.

[0087] As can be seen from the above embodiment, the present application combines double-mode oxygen supply, medium pressure pipeline, chest integration, intelligent monitoring, breathing cycle and positive pressure maintenance, and operates under the complete system architecture shown in the drawings. Not only the problems of oxygen supply flexibility, safety and comfort are solved, but also an efficient pressure monitoring, gas purification and maintenance scheme is provided, which constitutes an oxygen breathing system with advanced technology, complete process, safety and reliability.

[0088] Finally, it is to be explained that the above embodiments are only used to illustrate the technical solutions of the present application but not to limit the present application. Although the present application is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions, and all should be covered in the scope of the claims of the present application.

Claims

1. A dual-mode oxygen respirator, characterized in that, include: Oxygen cylinder assembly, serving as a high-pressure oxygen source; A pressure reducer, connected to the oxygen cylinder group via an oxygen cylinder valve, is used to reduce high-pressure oxygen to medium-pressure oxygen. The flow regulating device is worn on the user's chest and connected to the pressure reducer via a flexible medium-pressure air supply pipeline. It is equipped with a flow regulating mechanism for switching between at least two preset oxygen supply flow modes, including a sitting mode flow of not less than 0.5L / min and a normal working mode flow of 1.5 to 1.8L / min. A parameter acquisition unit, connected to the pressure reducer, is used to collect pressure data within the oxygen cylinder group in real time. An alarm, integrated into the flow regulating device, is used to receive pressure data collected by the parameter collector and display it in real time. An oxygen mask is in contact with the user and is used to inhale oxygen and exhale gas. A breathing connection assembly, connected to the flow regulating device and oxygen mask, is used to control the inhalation and exhalation cycles; The airbag assembly is connected to the breathing connection assembly, maintains a positive pressure state through a positive pressure mechanism, and is connected to the pressure reducer through an automatic replenishment mechanism to automatically replenish oxygen when oxygen consumption increases. The oxygen respirator protective structure serves as a mounting device to house the oxygen cylinder assembly, pressure reducer, flow regulator, and medium-pressure gas supply pipeline. The medium-pressure gas supply pipeline has a pressure resistance of 1 to 2.5 MPa and is used to deliver medium-pressure oxygen from the pressure reducer to the flow regulating device and the breathing connection assembly.

2. The oxygen respirator with dual-mode oxygen supply according to claim 1, characterized in that, The flow regulation device includes a body, a regulating valve group, and a flow regulation nut. The regulating valve group is built into the body and connected to the medium-pressure gas supply pipeline. The flow regulation nut serves as an external regulating mechanism, which can switch between a flow rate of ≥0.5L / min in the static mode and a flow rate of 1.5~1.8L / min in the normal working mode by rotating clockwise or counterclockwise.

3. The dual-mode oxygen respirator according to claim 2, characterized in that, The regulating valve assembly is connected to the machine body through a regulating valve sealing ring to ensure airtightness during the flow regulation process.

4. The dual-mode oxygen respirator according to claim 2, characterized in that, The medium-pressure air supply pipeline includes a flow input pipe and a flow output pipe, which are arranged in parallel outside the protective structure of the oxygen respirator. They are integrated and encapsulated into a medium-pressure air supply rubber composite pipe body by a common coating layer using multi-layer composite pressure-resistant material.

5. The dual-mode oxygen respirator according to claim 4, characterized in that, The flow input pipe and flow output pipe are connected to the body of the flow regulating device via flow supply pipe fastening screws. The flow input pipe is connected to the flow output connection device of the pressure reducer, and the flow output pipe is connected to the breathing connection group.

6. The dual-mode oxygen respirator according to claim 4, characterized in that, The two ends of the flow input tube and the flow output tube are connected by a quick-connect connector, which includes a copper metal connector to ensure electrical continuity and meet anti-static requirements.

7. The dual-mode oxygen respirator according to claim 1, characterized in that, The pressure reducer includes a high-pressure pipeline, two medium-pressure output pipelines, and a manual replenishment button. The high-pressure pipeline is connected to the parameter acquisition device to transmit high-pressure gas and collect pressure data. One medium-pressure output pipeline is connected to the automatic replenishment mechanism, and the other medium-pressure output pipeline is triggered by the manual replenishment button to provide additional oxygen.

8. The dual-mode oxygen respirator according to claim 1, characterized in that, The parameter acquisition device has a built-in wireless communication module, which sends the collected pressure data to the alarm via wireless communication. The alarm includes a processing unit and a display unit, which are used to display the pressure data in real time and trigger abnormal alarms.

9. The dual-mode oxygen respirator according to claim 1, characterized in that, The alarm is an electronic alarm, which is fixed to the body of the flow regulating device by electronic alarm fastening screws and is wirelessly connected to the parameter acquisition device.

10. The dual-mode oxygen respirator according to claim 1, characterized in that, The positive pressure mechanism includes a positive pressure spring and a positive pressure plate. The positive pressure spring acts on the positive pressure plate to maintain the pressure inside the airbag assembly within the range of 10 to 245 Pa.

11. The dual-mode oxygen respirator according to claim 7, characterized in that, The automatic replenishment mechanism includes a self-replenishing valve assembly, which is connected to a medium-pressure output pipeline of the pressure reducer and is used to automatically replenish oxygen to the airbag assembly when oxygen consumption increases.

12. The dual-mode oxygen respirator according to claim 1, characterized in that, It also includes a lever assembly, which is connected to the airbag assembly and the self-replenishing valve assembly. When the airbag pressure is lower than the threshold, the self-replenishing valve assembly is triggered to open and replenish the airbag.

13. The dual-mode oxygen respirator according to claim 1, characterized in that, It also includes an exhaust valve assembly connected to the airbag assembly, which automatically opens to exhaust air when the airbag pressure rises to 400-600 Pa.

14. The dual-mode oxygen respirator according to claim 1, characterized in that, It also includes a cooler assembly, which is connected to the flow output pipe of the medium-pressure gas supply line via a flow input connection device, for cooling medium-pressure oxygen and delivering it to the oxygen mask through the breathing connection assembly.

15. The dual-mode oxygen respirator according to claim 1, characterized in that, It also includes a purification canister assembly, which is connected to the breathing connection assembly and the airbag assembly, for absorbing CO2 in the exhaled gas and circulating the purified gas to the airbag assembly.

16. The dual-mode oxygen respirator according to claim 15, characterized in that, The breathing connection assembly includes an inhalation hose, an inhalation valve, a breathing three-way valve, an exhalation valve, and an exhalation hose. The inhalation hose connects the flow regulating device and the inhalation valve, transmitting medium-pressure oxygen to the oxygen mask. The exhalation hose connects the exhalation valve and the purification canister assembly, transmitting exhaled gas for CO2 absorption. The breathing three-way valve connects the inhalation valve, the exhalation valve, and the oxygen mask, controlling the direction of inhalation and exhalation flow.

17. The dual-mode oxygen respirator according to claim 2, characterized in that, The flow regulating device further includes a chest-mounted integrated control and display unit, which includes: The device is worn on the user's chest via adjustable straps or a magnetic fastening structure. The medium-pressure oxygen inlet and outlet are located on the machine body and connected to the medium-pressure gas supply pipeline; the flow regulating valve group is built into the machine body and connects the medium-pressure oxygen inlet and outlet. An electronic display alarm is fixed to the machine body and has a built-in wireless communication module and display screen for receiving and displaying pressure data from the parameter acquisition unit.

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