An air respirator with auxiliary oxygen supply function

Abstract

The utility model relates to an air respirator with auxiliary oxygen supply function, which comprises a compressed air supply system, a solid oxygen auxiliary supply system, a mask assembly and a back support assembly. The compressed air supply system comprises a compressed air cylinder, a compressed air pressure reducing valve, a compressed air supply pipeline, a pressure alarm device and an air supply valve. The solid oxygen auxiliary supply system comprises a solid oxygen generator assembly, an oxygen supply pipeline and an oxygen supply valve. The mask assembly comprises a transparent full mask, a half mask nested on the inner side of the full mask and two quick plug-in interfaces for independently connecting the air supply valve and the oxygen supply valve. The back support assembly comprises a shoulder strap, a waist belt and a back plate. The air respirator with auxiliary oxygen supply function can provide emergency oxygen in time after the positive pressure air respirator runs out of air, which is used for the escape of rescue and emergency personnel.

Description

Technical Field

[0001] This utility model belongs to the field of personal protective equipment technology, specifically relating to an air respirator with auxiliary oxygen supply function, which is particularly suitable for fire, toxic and harmful gas or oxygen-deficient environments, providing emergency rescue personnel with a main breathing air source and an emergency backup oxygen source, ensuring their operational safety and emergency evacuation. Background Technology

[0002] Positive pressure air respirators are mainly used by firefighters in fire or toxic gas environments during rescue operations. Existing positive pressure air respirators mainly consist of compressed air cylinders, back support components, pressure reducing valve components, air supply lines, mask components, and pressure alarm devices. The compressed air cylinders are normally filled with fresh compressed air for standby. When entering dangerous locations for rescue operations, rescuers put on the positive pressure air respirator, wear the mask components, open the pressure reducing valve, and enter the dangerous location to carry out rescue operations after their breathing has returned to normal.

[0003] Existing positive pressure air respirators have significant limitations: constrained by the design balance between weight and volume (which must simultaneously meet breathing needs and load requirements), the compressed air cylinder has a limited capacity, storing only a limited amount of compressed air. When rescue personnel encounter a situation where the cylinder pressure drops below the alarm threshold and the air is about to run out, they must immediately evacuate the hazardous environment; otherwise, they will face life-threatening danger. This is especially true in complex environments such as fire scenes, where failure to evacuate successfully within a limited time can easily lead to casualties. Such safety incidents occur every year. Therefore, it is essential to develop a device that can continuously provide emergency oxygen to ensure the safe escape of rescue personnel after the compressed air in the positive pressure air respirator has been depleted. Utility Model Content

[0004] In view of the problems existing in the positive pressure air respirators mentioned above, this utility model provides an air respirator with auxiliary oxygen supply function. Based on the traditional compressed air supply system, the respirator integrates an independent solid oxygen auxiliary supply system, which can provide emergency oxygen in a timely manner when the main air source is insufficient or exhausted, so as to ensure the user's escape needs.

[0005] To achieve the above objectives, this utility model provides an air respirator with auxiliary oxygen supply function, comprising a compressed air supply system, a solid oxygen auxiliary supply system, a mask assembly, and a back support assembly, wherein:

[0006] Compressed air supply system: provides air for main breathing, including compressed air cylinders, compressed air pressure reducing valves, compressed air delivery pipelines, pressure alarm devices and air supply valves;

[0007] Solid oxygen auxiliary gas supply system: Provides emergency oxygen when the main gas source is insufficient, including solid oxygen generator components, oxygen transmission pipeline and oxygen supply valve;

[0008] Mask assembly: forming an independent breathing chamber and achieving facial sealing, including a transparent full-face mask, a half-face mask nested inside the transparent full-face mask and sealingly fitting the user's mouth and nose area, and two quick-connect interfaces respectively set on the transparent full-face mask body for independently connecting the air supply valve and the oxygen supply valve.

[0009] Backrest assembly: Used to support the air source and secure it to the user's body, including a back panel, shoulder straps and waist belt, which can stably support compressed air cylinders and solid oxygen generator components.

[0010] Furthermore, the compressed air cylinder is securely mounted on the back support assembly by a fixing strap or tie.

[0011] Furthermore, the compressed air pressure reducing valve is directly installed on the cylinder valve outlet of the compressed air cylinder via a thread (such as the thread of the high-pressure cylinder valve interface) to reduce the high-pressure air in the cylinder to a medium-low pressure suitable for breathing; its outlet is connected to one end of the compressed air transmission pipeline via a threaded connection.

[0012] Furthermore, the other end of the compressed air pipeline is sealed to the air inlet of the air supply valve via a compression fitting.

[0013] Furthermore, the air supply valve is fixedly connected to the transparent full-face mask via a quick-connect interface; the air supply valve is preferably a positive pressure air supply valve, configured to deliver compressed air directly to the breathing chamber inside the half-mask through the quick-connect interface and the internal channel of the air supply valve, so as to continuously supply breathing gas to the user.

[0014] Furthermore, the pressure alarm device is connected to the medium-pressure air pipeline at the outlet of the compressed air pressure reducing valve to monitor the pressure in the pipeline (indirectly reflecting the remaining pressure in the compressed air cylinder); when the pressure is detected to drop to a preset safety alarm threshold (e.g., 5.5±0.5MPa), the device will immediately trigger an audible and visual alarm to prompt the user to start the solid oxygen auxiliary gas supply system.

[0015] Furthermore, the solid oxygen generator assembly is securely mounted on one side of the back support assembly via a fixing clamp. The fixing clamp adopts a quick-release structure for easy and rapid replacement of the assembly. The assembly is equipped with a pull ring ignition mechanism, which features a safety structure to prevent accidental triggering. When the compressed air pressure alarm is triggered, the user needs to manually pull the pull ring to ignite and start the generator. After ignition, the oxygen generator (such as sodium chlorate) decomposes at high temperature to produce oxygen.

[0016] Furthermore, the oxygen outlet of the solid oxygen generator assembly is sealed to one end of the oxygen supply pipeline via a compression fitting connection.

[0017] Furthermore, the other end of the oxygen pipeline is connected to the inlet port of the oxygen supply valve via a compression fitting.

[0018] Furthermore, the oxygen supply valve is preferably a positive pressure type, which is fixed to the transparent full-face mask via a quick-connect interface, and a sealing ring is provided at the penetration point to ensure airtightness; oxygen enters the interior of the transparent full-face mask through this valve to provide auxiliary emergency oxygen to the user.

[0019] Furthermore, the transparent full-face mask forms a primary seal with the user's face, and the half-face mask forms a secondary seal by tightly fitting the user's mouth and nose area through its own silicone sealing ring, together constituting a double sealing structure; the half-face mask is equipped with a breathing membrane.

[0020] Furthermore, the breathing diaphragm is a one-way flow-guiding valve diaphragm, characterized in that: during inhalation, the diaphragm deforms due to the relative negative pressure inside the half-mask, opening to allow oxygen (originating from the auxiliary oxygen supply system) from the interior of the full-face mask to flow into the half-mask through the diaphragm's conduction channel, thus meeting the user's inhalation needs; simultaneously, the positive pressure environment inside the full-face mask is indirectly transferred to the half-mask through this conduction path, achieving stable maintenance of the positive pressure environment inside the half-mask. During exhalation, the diaphragm is tightly sealed against the sealing surface under the increased air pressure inside the half-mask, closing to allow exhaled air to be discharged to the outside of the mask only through the exhalation channel integrated into the mask assembly.

[0021] Furthermore, the back panel of the back support assembly is made of high-strength composite material, the compressed air cylinder is vertically fixed in the middle of the back panel, and the solid oxygen generator assembly is vertically fixed on the left side of the back panel; the shoulder straps and waist belt are both made of flame-retardant material and are equipped with length adjustment buckles and quick release devices.

[0022] Furthermore, both the compressed air pipeline and the oxygen pipeline are made of flame-retardant rubber.

[0023] Advantages of this utility model:

[0024] This invention relates to an air respirator with auxiliary oxygen supply function. Compared to traditional positive pressure air respirators, its core advantage lies in the addition of an emergency oxygen supply mechanism. When the compressed air in the compressed air cylinder is about to run out and triggers an alarm signal, emergency rescue personnel can manually activate the solid oxygen generator. Oxygen is then precisely delivered to the mask assembly via a dedicated gas pipeline, providing continuous and stable oxygen support to the rescue personnel. This ensures they have sufficient time to evacuate from the danger zone, thereby effectively reducing the risk of casualties during emergency rescue operations. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings.

[0026] Figure 1 A schematic diagram of the structure of the air respirator with auxiliary oxygen supply function provided by this utility model;

[0027] Figure 2 This is a schematic diagram of the solid oxygen generator assembly provided by this utility model.

[0028] The markings in the diagram are as follows: 1-Compressed air cylinder, 2-Back support assembly, 3-Compressed air pressure reducing valve, 4-Compressed air supply line, 5-Air supply valve, 6-Pressure alarm device, 7-Solid oxygen generator assembly, 8-Oxygen supply line, 9-Oxygen supply valve, 10-Half mask, 11-Transparent full mask, 12-Breathing diaphragm, 13-Pull ring. Detailed Implementation

[0029] The specific embodiments are described below with reference to the accompanying drawings, but this utility model is not limited to these specific embodiments.

[0030] like Figures 1 to 2 As shown, the present invention provides an air respirator with auxiliary oxygen supply function, which consists of a compressed air supply system, a solid oxygen auxiliary supply system, a mask assembly, and a back support assembly 2, wherein:

[0031] Compressed air supply system: provides air for main breathing, including compressed air cylinder 1, compressed air pressure reducing valve 3, compressed air delivery pipeline 4, pressure alarm device 6 and air supply valve 5;

[0032] Solid oxygen auxiliary gas supply system: provides emergency oxygen when the main gas source is insufficient, including solid oxygen generator assembly 7, oxygen transmission pipeline 8 and oxygen supply valve 9.

[0033] The mask assembly forms an independent breathing chamber and seals with the user's face. It includes a transparent full-face mask 11, a half-face mask 10 nested inside the transparent full-face mask 11 and sealed to the user's mouth and nose area, and two quick-connect interfaces provided on the transparent full-face mask 11 for independently connecting the air supply valve 5 and the oxygen supply valve 9.

[0034] Backrest assembly 2: It carries the air source and is fixed to the user's body. It includes a back panel, shoulder straps and waist belt, and is used to securely support the compressed air cylinder 1 and the solid oxygen generator assembly 7.

[0035] In this embodiment, the compressed air cylinder 1 is securely mounted on the back support assembly 2 by a fixing strap or a binding strap.

[0036] In this embodiment, the compressed air pressure reducing valve 3 is directly installed on the cylinder valve outlet of the compressed air cylinder 1 through a high-pressure threaded interface, and is used to reduce the high-pressure air in the cylinder to a medium-low pressure suitable for breathing; the outlet of the compressed air pressure reducing valve 3 is connected to one end of the compressed air transmission pipeline 4 through a threaded connection.

[0037] In this embodiment, the other end of the compressed air pipeline 4 is sealed to the air inlet of the air supply valve 5 via a ferrule connection.

[0038] In this embodiment, the air supply valve 5 is fixed to the mask assembly via a quick-connect method, preferably a positive pressure air supply valve; it is configured to deliver compressed air directly to the breathing chamber inside the half-mask 10 through the quick-connect interface and the internal channel of the air supply valve 5, so as to continuously supply breathing gas to the user.

[0039] In this embodiment, the pressure alarm device 6 is installed on the medium-pressure air pipeline at the outlet of the compressed air pressure reducing valve 3 via a clamp connection to monitor the pressure of the pipeline (indirectly reflecting the remaining pressure of the compressed air cylinder 1). When the pressure is detected to drop to a preset safety alarm threshold (e.g., 5.5 ± 0.5 MPa), the device will immediately trigger an audible and visual alarm to alert the user to start the solid oxygen auxiliary gas supply system.

[0040] In this embodiment, the solid oxygen generator assembly 7 is securely installed on the left side of the back support assembly 2 by a quick-release fixing clamp; the assembly preferably uses the oxygen generator disclosed in patent "CN117443291A (an oxygen generator with a central hole oxygen-generating column)," but can also be replaced with other solid oxygen generators known in the art; the assembly is equipped with a manual pull ring 13 ignition mechanism, which is equipped with a safety structure to prevent accidental triggering; when the compressed air pressure alarm is triggered, the user needs to manually pull the pull ring 13 to ignite and start it. After starting, the oxygen generating agent (such as sodium chlorate) decomposes at high temperature to produce oxygen.

[0041] In this embodiment, the oxygen outlet of the solid oxygen generator assembly 7 is connected to one end of the oxygen supply pipeline 8 via a compression fitting connection.

[0042] In this embodiment, the other end of the oxygen pipeline 8 is connected to the inlet of the oxygen supply valve 9 via a compression fitting.

[0043] In this embodiment, the oxygen supply valve 9 is a positive pressure type, which is fixed to the transparent full-face mask 11 through a quick-connect interface, and a sealing ring is provided at the through-hole to ensure airtightness; oxygen enters the interior of the transparent full-face mask 11 through this valve to provide auxiliary emergency oxygen to the user.

[0044] In this embodiment, the transparent full-face mask 11 forms a primary seal with the user's face, and the half-face mask 10 forms a secondary seal by tightly fitting the user's mouth and nose area through its own silicone sealing ring, together constituting a double sealing structure; the half-face mask 10 is equipped with a breathing membrane 12.

[0045] In this embodiment, the breathing diaphragm 12 is a one-way flow-guiding valve diaphragm, characterized in that: during inhalation, the diaphragm deforms due to the relative negative pressure formed inside the half-mask 10, allowing oxygen (from the auxiliary oxygen supply system) inside the transparent full-mask 11 to flow into the half-mask 10 through the diaphragm's conduction channel to meet the user's inhalation needs. At the same time, the positive pressure environment inside the transparent full-mask 11 is indirectly transferred to the half-mask 10 through this conduction path, thereby achieving stable maintenance of the positive pressure environment inside the half-mask 10. During exhalation, the diaphragm is tightly fitted to the sealing surface and is in a closed state under the action of the increased air pressure inside the half-mask 10, so that the exhaled gas can only be discharged to the outside of the mask through the exhalation channel integrated in the mask assembly.

[0046] In this embodiment, the back panel of the back support assembly 2 is made of high-strength composite material; the compressed air cylinder 1 is vertically fixed in the middle of the back panel, and the solid oxygen generator assembly 7 is vertically fixed on the left side of the back panel; the shoulder straps and waist belt are both made of flame-retardant material and are equipped with length adjustment buckles and quick release devices.

[0047] In this embodiment, both the compressed air pipeline 4 and the oxygen pipeline 8 are made of flame-retardant rubber.

[0048] The safety benefits of this breathing apparatus include: when the main compressed air supply system runs out of air, the user can immediately switch to the solid oxygen generator oxygen supply mode, relying on the oxygen provided to maintain normal breathing and safely evacuate from the dangerous environment, effectively avoiding dangers caused by lack of oxygen, and improving the safety and adaptability of rescue operations in complex or high-risk environments.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model 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; and these 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 utility model.

Claims

1. An air respirator with auxiliary oxygen supply function, characterized in that, Includes a compressed air supply system, a solid oxygen auxiliary supply system, a mask assembly, and a back support assembly, wherein: The compressed air supply system includes a compressed air cylinder, a compressed air pressure reducing valve, a compressed air pipeline, and a pressure alarm device. The solid oxygen auxiliary gas supply system includes a solid oxygen generator assembly, an oxygen transmission pipeline, and an oxygen supply valve. The mask assembly includes a transparent full-face mask, a half-face mask nested inside the full-face mask and integrating a breathing diaphragm, and two quick-connect interfaces on the transparent full-face mask for independently connecting an air supply valve and an oxygen supply valve. The back support assembly includes a high-strength composite material back panel, flame-retardant shoulder straps with quick-release devices, and a waist belt.

2. The air respirator with auxiliary oxygen supply function according to claim 1, characterized in that, The solid oxygen generator assembly is vertically fixed to the back support assembly by a quick-release fixing clamp. The assembly is equipped with a manual pull ring ignition mechanism, which generates oxygen by decomposing the oxygen generator agent after startup.

3. The air respirator with auxiliary oxygen supply function according to claim 1, characterized in that, The oxygen pipeline is connected at both ends to the outlet of the solid oxygen generator and the oxygen supply valve via a compression fitting. The pipeline is made of flame-retardant rubber.

4. The air respirator with auxiliary oxygen supply function according to claim 3, characterized in that, The oxygen supply valve is a positive pressure supply valve, which is fixed to the transparent full-face mask via a quick-connect interface.

5. The air respirator with auxiliary oxygen supply function according to claim 1, characterized in that, The breathing diaphragm is a one-way flow valve diaphragm, which is configured to allow oxygen to flow unidirectionally from the internal chamber of the transparent full-face mask to the internal breathing chamber of the half-face mask, and automatically seals itself during exhalation, so that exhaled gas can only be discharged to the outside of the mask through the exhalation channel integrated into the mask assembly.

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