Chemical oxygen breathing apparatus

Abstract

The utility model relates to the technical field of respiratory protection equipment, in particular to a chemical oxygen generating respirator which comprises a mask, an oxygen generating box and an air bag. An air outlet pipe of the mask is communicated with an air inlet of the oxygen generation box; an air outlet of the oxygen generating box is communicated with an inlet of the air bag; an outlet of the airbag communicates with an air inlet pipe of the mask; a conical heat dissipation frame is arranged in the middle of the top end of the air bag and penetrates through the air bag in the thickness direction of the air bag. The inlet is formed in the bottom end of the airbag; an outlet of the air bag is formed in the top end of the air bag and located above the conical heat dissipation frame. By ingeniously arranging the mounting positions of the inlet and the conical heat dissipation frame on the air bag and the conical structure of the conical heat dissipation frame, the flowing path of air in the air bag is prolonged, efficient heat dissipation is conducted through the conical heat dissipation frame, and the cooling effect of the air bag on oxygen is improved.

Description

Technical Field

[0001] This utility model relates to the field of respiratory protection equipment technology, specifically to a chemical oxygen respirator. Background Technology

[0002] Chemical oxygen respirators are a standard respiratory protection device that can effectively cope with special environments such as fires, hazardous gas leaks, and mine operations, ensuring that the wearer can breathe normally for a certain period of time.

[0003] Heat dissipation is one of the key issues that needs to be addressed in chemical oxygen respirators. Existing chemical oxygen respirators generally improve the cooling effect on the gas inside by placing the oxygen tank externally in the air bag, and integrating coolant into the oxygen tank for cooling, which results in high equipment costs. Equipment that directly cools the gas through the air bag is less common.

[0004] A patent with publication number CN203724658U discloses a chemical oxygen fire-fighting self-rescue respirator that is easy to dissipate heat and cool down. It uses a breathing mask to introduce exhaled carbon dioxide and water vapor into an oxygen-generating tank. The carbon dioxide and water vapor react with an oxygen-generating agent to produce oxygen. The oxygen then enters the airbag and circulates for cooling before finally entering the breathing mask for respiration. The breathing mask is equipped with exhalation and inhalation one-way valves to control the gas flow.

[0005] However, in this patent, the airflow is obstructed by the oxygen generator and oxygen-generating agent, resulting in poor airflow and difficulty in forming a backflow within the airbag, leading to a poor gas cooling effect. Secondly, when the oxygen discharged into the airbag through the airbag inlet is at a higher temperature than the oxygen at the bottom of the airbag, due to the characteristic that heat flows upward, the oxygen at the airbag inlet will not sink but will flow directly through both sides of the airbag hole to the airbag outlet. This causes the airbag's backflow structure to fail, reducing the airbag's cooling effect and resulting in the human body inhaling excessively hot oxygen, causing discomfort. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a chemical oxygen respirator, which solves the technical problem of poor airbag cooling effect of the existing chemical oxygen respirator.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the chemical oxygen-generating respirator of this utility model includes a mask, an oxygen-generating tank, and an air bag.

[0010] The air outlet of the mask is connected to the air inlet of the oxygen generator; the air outlet of the oxygen generator is connected to the inlet of the airbag; and the air outlet of the airbag is connected to the air inlet of the mask.

[0011] A conical heat dissipation frame is provided at the center of the top of the airbag, and the conical heat dissipation frame penetrates the airbag along the thickness direction of the airbag; the inlet is provided at the bottom of the airbag; the outlet of the airbag is provided at the top of the airbag, and the outlet is located above the conical heat dissipation frame.

[0012] Optionally, the airbag has a built-in first adapter pipe communicating with the inlet;

[0013] The first adapter pipe is disposed along the thickness direction of the airbag;

[0014] Along the thickness direction of the airbag, the first adapter pipe has a plurality of first ventilation holes arrayed on it.

[0015] Optionally, a pair of the inlets are provided on both sides of the bottom end of the airbag in a one-to-one correspondence;

[0016] The airbag has a pair of second adapter pipes arranged horizontally inside; the pair of second adapter pipes are connected to the pair of inlets in a one-to-one correspondence, and the exhaust ports of the pair of second adapter pipes are arranged opposite to each other;

[0017] Along the horizontal direction, the second adapter pipe has multiple second vent holes arranged in an array.

[0018] Optionally, the airbag may also have a first heat dissipation frame and a second heat dissipation frame extending through its thickness direction;

[0019] The first heat dissipation frame and the second heat dissipation frame are respectively disposed on both sides of the airbag.

[0020] Optionally, the chemical oxygen respirator further includes a pressure relief valve; the pressure relief valve includes an outer sealing plate, a housing, a connecting rod, a first spring, and an inner push plate;

[0021] One end of the connecting rod is connected to the outer sealing plate, and the other end is connected to the inner push plate; the first spring is sleeved on the connecting rod; the housing is disposed between the outer sealing plate and the inner push plate; one end of the first spring is connected to the inner wall of the housing, and the other end is connected to the outer sealing plate or the inner push plate respectively;

[0022] The housing is connected to the first heat dissipation frame; the first end of the housing is disposed inside the cavity of the first heat dissipation frame, and the second end of the housing is disposed inside the airbag;

[0023] Under normal conditions, the outer sealing plate abuts against the first end of the housing; under depressurized conditions, the outer sealing plate moves away from the first end of the housing.

[0024] Optionally, the chemical oxygen-generating respirator further includes an air intake valve; the air intake valve includes an outer cover plate, a valve body, a connecting rod, a second spring, and an inner cover plate;

[0025] One end of the connecting rod is connected to the outer cover plate, and the other end is connected to the inner cover plate; the second spring is sleeved on the connecting rod; the valve body is disposed between the outer cover plate and the inner cover plate; one end of the second spring is connected to the inner wall of the valve body, and the other end is connected to the outer cover plate or the inner cover plate respectively;

[0026] The valve body is connected to the second heat dissipation frame; the first end of the valve body is located inside the cavity of the second heat dissipation frame, and the second end of the valve body is located inside the airbag;

[0027] Under normal conditions, the inner cover plate abuts against the second end of the valve body; under negative pressure conditions, the inner cover plate moves away from the second end of the valve body.

[0028] Optionally, both the outer cover plate and the inner push plate are provided with multiple through holes; the through holes can communicate with the valve body or the housing.

[0029] Optionally, the chemical oxygen-generating respirator further includes a pair of filter components corresponding to the first heat dissipation frame and the second heat dissipation frame; the filter components include a sleeve and a filter layer;

[0030] One end of the sleeve is filled with the filter layer, and the other end is detachable from the first heat dissipation frame or the second heat dissipation frame.

[0031] The outer sealing plate or the outer cover plate is located inside the sleeve.

[0032] (III) Beneficial Effects

[0033] The beneficial effects of this utility model are:

[0034] By introducing oxygen at the bottom of the air bladder, the oxygen rises from the bottom to the top of the air bladder and is then discharged through the outlet. This longer flow path results in a longer cooling time and a better cooling effect. Furthermore, due to the thrust generated by human exhalation and the characteristics of heat flow, even if the temperature of the oxygen introduced at the inlet is high, it will not affect the oxygen flow path, ensuring the cooling effect of the air bladder and effectively extending the usage time of the chemical oxygen generator.

[0035] A conical heat dissipation frame is positioned at the top center of the airbag and extends through the airbag along its thickness. This allows oxygen discharged from the outlet below the conical heat dissipation frame to rise and contact the base plate of the frame, thus dividing it into two gas flow paths. This further extends the gas flow path within the airbag and improves its cooling effect. The conical heat dissipation frame also facilitates heat exchange between the external gas and the gas inside the airbag, enhancing its overall heat dissipation performance.

[0036] By cleverly designing the installation positions of the inlet and the conical heat dissipation frame on the airbag, as well as the conical structure of the heat dissipation frame, the flow path of the gas inside the airbag is extended, and efficient heat dissipation is achieved through the conical heat dissipation frame, thereby improving the airbag's cooling effect on oxygen. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of the chemical student oxygen respirator in the first embodiment of this utility model;

[0038] Figure 2 This is a schematic diagram of the structure of the chemical student oxygen respirator in the second embodiment of this utility model;

[0039] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0040] Figure 4 This is a schematic diagram of the structure of the chemical student oxygen respirator in the third embodiment of this utility model;

[0041] Figure 5 This is a schematic diagram of the pressure relief valve of this utility model;

[0042] Figure 6 This is a schematic diagram of the intake valve of this utility model;

[0043] Figure 7 This is a schematic diagram of the structure of the filter assembly of this utility model.

[0044] [Explanation of Labels in the Attached Image]

[0045] 1: Face mask;

[0046] 2: Oxygen generator;

[0047] 3: Airbag; 31: Inlet; 32: Outlet;

[0048] 4: Conical heat sink frame; 41: First heat sink frame; 42: Second heat sink frame;

[0049] 6: Second adapter pipe; 61: Exhaust port; 62: Second vent hole;

[0050] 7: Pressure relief valve; 71: Outer sealing plate; 72: Housing; 721: Annular wall; 73: Connecting rod; 74: First spring; 75: Inner push plate; 76: Sealing ring;

[0051] 8: Intake valve; 81: Outer cover plate; 811: Through hole; 82: Valve body; 83: Connecting rod; 84: Second spring; 85: Inner cover plate;

[0052] 9: Filter assembly; 91: Sleeve; 92: Filter layer. Detailed Implementation

[0053] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0054] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0055] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0056] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; "connection" can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0057] See Figure 1This utility model provides a chemical oxygen respirator, which includes a mask 1, an oxygen tank 2, and an air bag 3; the air outlet of the mask 1 is connected to the air inlet of the oxygen tank 2; the air outlet of the oxygen tank 2 is connected to the inlet 31 of the air bag 3; the air outlet 32 ​​of the air bag 3 is connected to the air inlet of the mask 1; a conical heat dissipation frame 4 is provided at the middle of the top of the air bag 3, and the conical heat dissipation frame 4 penetrates the air bag 3 along the thickness direction; the inlet 31 is provided at the bottom of the air bag 3; the air outlet 32 ​​is provided at the top of the air bag 3, and the outlet 32 ​​is located above the conical heat dissipation frame 4.

[0058] The mask 1 is equipped with an inhalation one-way valve and an exhalation one-way valve. These valves can also be installed in the inlet or outlet pipe of the mask 1. The inhalation and exhalation valves open or close when their respective thresholds are reached. This ensures unidirectional gas flow and maintains consistent gas pressure within the mask, preventing discomfort caused by abnormal inhaled gas pressure. The oxygen generator 2 uses an existing oxygen generator and contains an oxygen-generating agent. Exhaled carbon dioxide and water vapor react with the agent to produce oxygen. The oxygen is stored in an air bag 3, which is elastically deformable, buffering the gas pressure.

[0059] By introducing oxygen into the bottom of the air bladder 3, the oxygen can rise from the bottom to the top of the air bladder 3 and then be discharged through the outlet 32. This results in a longer flow path, a longer cooling time, and a better cooling effect. Furthermore, due to the thrust generated by human exhalation and the characteristics of heat flow, even if the temperature of the oxygen discharged into the inlet 31 is high (e.g., the coolant in the oxygen generator 2 fails), it will not affect the oxygen flow path, ensuring the cooling effect of the air bladder 3 on the oxygen and effectively extending the usage time of the chemical oxygen generator.

[0060] A conical heat dissipation frame 4 is positioned at the top center of the airbag 3 and extends through the airbag 3 along its thickness. This allows oxygen discharged from the outlet 32 ​​below the conical heat dissipation frame 4 to rise and contact the bottom plate of the conical heat dissipation frame 4, thus dividing it into two gas flow paths. This further extends the gas flow path within the airbag 3 and improves its cooling effect. The conical heat dissipation frame 4 can exchange heat between the external gas and the gas inside the airbag, enhancing its heat dissipation performance. The conical heat dissipation frame 4 can be an optional conical frame formed by thermally conductive metal plates, which can further improve the heat dissipation performance of the airbag 3.

[0061] Optionally, the top of the airbag 3 is cone-shaped and adapted to the cone-shaped heat dissipation frame 4, so that two gas flow branches can be constructed between the inner wall of the airbag 3 and the cone-shaped heat dissipation frame 4, so that the airflow can flow closely along the side wall of the cone-shaped heat dissipation frame 4, thereby achieving efficient heat exchange. Finally, the two gas flow branches converge at the top of the cone-shaped heat dissipation frame 4 and are discharged through the outlet 32.

[0062] By cleverly setting the installation positions of the inlet 31 and the conical heat dissipation frame 4 on the airbag 3, and the conical structure of the conical heat dissipation frame 4, the flow path of the gas in the airbag 3 is extended, and efficient heat dissipation is achieved through the conical heat dissipation frame 4, thereby improving the cooling effect of the airbag 3 on oxygen.

[0063] It should be noted that the chemical oxygen-generating respirator of this utility model is mainly based on external cooling equipment (such as water cooling or coolant cooling), with airbag 3 as a secondary cooling method, which is an improvement made to enhance the heat dissipation performance of the existing airbag.

[0064] First embodiment:

[0065] The airbag 3 has a built-in first adapter pipe that communicates with the inlet 31. The first adapter pipe is arranged along the thickness direction of the airbag 3. Along the thickness direction of the airbag 3 (i.e., the axial direction of the inlet 31), a plurality of first vent holes are arrayed on the first adapter pipe. Specifically, when oxygen flows in the first adapter pipe, before being discharged through the port of the first adapter pipe, the oxygen can be discharged into the cavity of the airbag 3 through the plurality of first vent holes in sequence, so that the oxygen can be evenly distributed in the cavity of the airbag 3, thereby uniformly distributing the gas temperature inside the cavity and avoiding the situation where the local temperature is too high, which would make it difficult for the conical heat dissipation frame 4 to reduce the temperature to the preset temperature within an effective time, thus ensuring that the gas inhaled by the human body is a low-temperature gas.

[0066] Optionally, the port of the first adapter pipe (analogous to exhaust port 61) is located directly below the bottom plate of the conical heat dissipation frame 4, that is, the inlet 31 is located at the center of the length (horizontal direction) and width (thickness direction) of the bottom plate of the conical heat dissipation frame 4, so that the oxygen discharged at the inlet 31 can rise and exchange heat with the center of the bottom plate of the conical heat dissipation frame 4, resulting in higher heat exchange efficiency. The first adapter pipe can be a straight, L-shaped, T-shaped, or a combination thereof.

[0067] Second embodiment:

[0068] like Figure 2 and Figure 3 As shown, a pair of inlets 31 are correspondingly arranged on both sides of the bottom end of the airbag 3; the airbag 3 has a pair of second connecting pipes 6 arranged horizontally inside; the pair of second connecting pipes 6 are connected to the pair of inlets 31, and the exhaust ports 61 of the pair of second connecting pipes 6 are arranged opposite each other; along the horizontal direction, multiple second vent holes 62 are arrayed on the second connecting pipes 6. Compared with the first embodiment, the difference is that in the second embodiment, the pair of inlets 31 and their second connecting pipes 6 are correspondingly arranged on both sides of the bottom end of the airbag 3. Through the multiple second vent holes 62 and the pair of exhaust ports 61, oxygen can be evenly distributed in the horizontal direction, which can also play the role of uniformly distributing the gas temperature inside the airbag 3 cavity.

[0069] Third embodiment:

[0070] See Figure 4 The airbag 3 also has a first heat dissipation frame 41 and a second heat dissipation frame 42 extending along its thickness direction; the first heat dissipation frame 41 and the second heat dissipation frame 42 are respectively arranged on both sides of the airbag 3. On the one hand, the heat dissipation frame can further improve the heat exchange efficiency between the gas inside the airbag 3 and the gas outside, and further improve the cooling effect of the airbag 3. On the other hand, the heat dissipation frame can play a guiding role. The arrow in the figure shows the direction of airflow. It can be seen that the oxygen discharged through the second vent 62 can first exchange heat with the heat dissipation frame during the rising process, and then exchange heat with the conical heat dissipation frame 4, so as to quickly reduce the gas temperature inside the airbag 3 cavity through secondary cooling.

[0071] See Figure 5 The chemical oxygen respirator also includes a pressure relief valve 7; the pressure relief valve 7 includes an outer sealing plate 71, a housing 72, a connecting rod 73, a first spring 74, and an inner push plate 75; one end of the connecting rod 73 is connected to the outer sealing plate 71, and the other end is connected to the inner push plate 75; the first spring 74 is sleeved on the connecting rod 73; the housing 72 is disposed between the outer sealing plate 71 and the inner push plate 75; one end of the first spring 74 is connected to the inner wall of the housing 72, and the other end is connected to the outer sealing plate 71 or the inner push plate 75 respectively; the housing 72 is connected to the first heat dissipation frame 41; the first end of the housing 72 is disposed inside the cavity of the first heat dissipation frame 41, and the second end of the housing 72 is disposed inside the airbag 3; under normal conditions, the outer sealing plate 71 abuts against the first end of the housing 72; under pressure relief conditions, the outer sealing plate 71 is away from the first end of the housing 72. In this embodiment, the first spring 74 is disposed between the outer sealing plate 71 and the annular wall 721 of the housing 72. The first spring 74 is a tension spring, which ensures that the first end of the housing 72 is closed and the second end of the housing 72 is open under normal conditions, ensuring that the airbag 3 is a sealed cavity, preventing external gas or impurities from flowing into the cavity of the airbag 3. Under normal conditions, the internal pressure of the airbag 3 is basically the same as the external pressure. Under depressurization conditions, such as when there is an accidental impact or the carbon dioxide concentration in the cavity of the airbag 3 is too high, the airbag 3 is squeezed, and the internal pressure increases, allowing the gas to push the inner push plate 75 to move axially along the connecting rod 73. At this time, the first end of the housing 72 is open and the second end of the housing 72 is closed. The airflow inside the cavity of the airbag 3 is discharged through the second end of the housing 72, the inner cavity of the housing 72, and the first end of the housing 72 until the air pressure drops to a preset value and the pressure relief valve 7 is reset. The elastic force of the first spring 74 can be set according to the preset value. This pressure relief process is completed adaptively by the pressure relief valve 7, which can balance the gas pressure in the airbag 3 cavity and effectively prevent high-pressure gas from entering the outlet 32 ​​and causing respiratory discomfort to the human body.

[0072] Optionally, a sealing ring 76 is provided on the side of the outer sealing plate 71 facing the housing 72 to improve the sealing effect of the outer sealing plate 71 on the first end of the housing 72. Multiple through holes 811 can be opened on the inner push plate 75, which can communicate with the housing 72 to improve the flow of gas in the pressure relief valve 7 under pressure relief conditions and quickly complete the pressure relief.

[0073] See Figure 6 The chemical oxygen respirator also includes an intake valve 8; the intake valve 8 includes an outer cover plate 81, a valve body 82, a connecting rod 83, a second spring 84, and an inner cover plate 85; one end of the connecting rod 83 is connected to the outer cover plate 81, and the other end is connected to the inner cover plate 85; the second spring 84 is sleeved on the connecting rod 83; the valve body 82 is located between the outer cover plate 81 and the inner cover plate 85; one end of the second spring 84 is connected to the inner wall of the valve body 82, and the other end is connected to either the outer cover plate 81 or the inner cover plate 85; the valve body 82 is connected to the second heat dissipation frame 42; the first end of the valve body 82 is located inside the cavity of the second heat dissipation frame 42, and the second end of the valve body 82 is located inside the air bladder 3; under normal conditions, the inner cover plate 85 abuts against the second end of the valve body 82; under negative pressure conditions, the inner cover plate 85 is away from the second end of the valve body 82. Specifically, the intake valve 8 is designed similarly to the pressure relief valve 7, and their structural and driving principles are identical, so they will not be described in detail here. The difference lies in the opposite direction of pressure relief. Since the pressure in the airbag 3 decreases after the pressure relief valve 7 completes its pressure relief, if the airbag 3's cavity volume is too small, the stored air inside the cavity may fall below the warning value, potentially causing a safety hazard. Therefore, an intake valve 8 is added. When the air pressure in the airbag 3's cavity is lower than the preset value, i.e., when the cavity is under negative pressure, atmospheric pressure pushes the outer cover plate 81 to move axially along the connecting rod 83. The first end of the inner cover plate 85 closes, and the second end of the inner cover plate 85 opens. External gas enters the airbag 3's cavity through the intake valve 8, adaptively replenishing air and pressure, thus preventing the safety hazard caused by excessively low air pressure. Similarly, the intake valve 8 can integrate a sealing ring 76, and the outer cover plate 81 can have a through hole 811.

[0074] It should be noted that the intake valve 8 should not be activated in special or harsh environments to prevent harmful gases from entering the air bladder 3. The intake valve 8 is primarily used for rapid ventilation in normal gas environments. Through the linkage between the pressure relief valve 7 and the intake valve 8, high-temperature gases or high-concentration carbon dioxide in the air bladder 3 are rapidly discharged, and normal low-temperature gases from the outside are rapidly discharged in, enabling the chemical oxygen respirator to quickly resume operation and extending its working time.

[0075] Optionally, the pressure relief valve 7 and the air intake valve 8 can be configured with a snap-fit ​​structure, allowing manual control of the valve opening and closing. Before depressurization, the pressure relief valve 7 is opened and the air intake valve 8 is closed. By manually squeezing the air bladder 3 to allow the gas inside to flow, the pressure relief valve 7 is depressurized. After depressurization is complete, the pressure relief valve 7 is closed and the air intake valve 8 is opened, allowing outside gas to enter the air bladder 3 until the pressure difference between the inside and outside of the air bladder 3 becomes equal. Then, the air intake valve 8 is closed, completing the ventilation process.

[0076] like Figure 7 As shown, the chemical oxygen respirator also includes a pair of filter components 9 connected to the first heat sink 41 and the second heat sink 42 respectively; the filter components 9 include a sleeve 91 and a filter layer 92; one end of the sleeve 91 is filled with the filter layer 92, and the other end is detachably connected to the first heat sink 41 or the second heat sink 42; the outer sealing plate 71 or the outer cover plate 81 is located inside the sleeve 91. Specifically, the filter layer 92 can be a filter nozzle of an existing filter respirator, with a built-in filter screen and filter agent to directly filter the outside gas, providing a safety guarantee for the outside gas discharged into the air bag 3, so that the chemical oxygen respirator can open the air inlet valve 8 to replenish the outside gas even in harsh environments, improving the adaptability of the chemical oxygen respirator to various environmental operations. In this embodiment, the filter assembly 9 is designed as a sleeve structure. The sleeve 91 can be threaded or snapped into the heat sink frame. It is sealed by the sealing ring fitted on the sleeve 91, which facilitates the quick disassembly and assembly of the filter assembly 9 and the quick replacement of the filter layer 92. With the linkage structure formed by the pressure relief valve 7 and the air intake valve 8, the chemical oxygen respirator can be quickly restarted and put back into use in a short time.

[0077] It should be understood that the above description of the specific embodiments of this utility model is only for illustrating the technical route and features of this utility model, and its purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. However, this utility model is not limited to the specific embodiments described above. All changes or modifications made within the scope of the claims of this utility model should be covered by the protection scope of this utility model.

Claims

1. A chemical oxygen-generating respirator, characterized in that, The chemical oxygen-generating respirator includes a mask (1), an oxygen-generating tank (2), and an air bag (3); The air outlet of the mask (1) is connected to the air inlet of the oxygen generator (2); the air outlet of the oxygen generator (2) is connected to the inlet (31) of the airbag (3); the outlet (32) of the airbag (3) is connected to the air inlet of the mask (1). A conical heat dissipation frame (4) is provided at the middle of the top of the airbag (3), and the conical heat dissipation frame (4) penetrates the airbag (3) along the thickness direction of the airbag (3); the inlet (31) is provided at the bottom of the airbag (3); the outlet (32) of the airbag (3) is provided at the top of the airbag (3), and the outlet (32) is located above the conical heat dissipation frame (4).

2. The chemical oxygen-generating respirator according to claim 1, characterized in that, The airbag (3) has a first adapter pipe that communicates with the inlet (31); The first adapter pipe is disposed along the thickness direction of the airbag (3); Along the thickness direction of the airbag (3), a plurality of first ventilation holes are arrayed on the first adapter pipe.

3. The chemical oxygen-generating respirator according to claim 1, characterized in that, A pair of the inlets (31) are provided on both sides of the bottom end of the airbag (3) in a one-to-one correspondence; The airbag (3) has a pair of second adapter pipes (6) arranged in the horizontal direction; the pair of second adapter pipes (6) are connected to the pair of inlets (31) in a one-to-one correspondence, and the exhaust ports (61) of the pair of second adapter pipes (6) are arranged opposite to each other; Along the horizontal direction, the second adapter pipe (6) is provided with a plurality of second vent holes (62).

4. The chemical oxygen-generating respirator according to any one of claims 1-3, characterized in that, The airbag (3) is also provided with a first heat dissipation frame (41) and a second heat dissipation frame (42) that extend through its thickness direction; The first heat dissipation frame (41) and the second heat dissipation frame (42) are respectively disposed on both sides of the airbag (3).

5. The chemical oxygen-generating respirator according to claim 4, characterized in that, The chemical oxygen respirator also includes a pressure relief valve (7); the pressure relief valve (7) includes an outer sealing plate (71), a housing (72), a connecting rod (73), a first spring (74), and an inner push plate (75); One end of the connecting rod (73) is connected to the outer sealing plate (71), and the other end is connected to the inner push plate (75); the first spring (74) is sleeved on the connecting rod (73); the housing (72) is disposed between the outer sealing plate (71) and the inner push plate (75); one end of the first spring (74) is connected to the inner wall of the housing (72), and the other end is connected to the outer sealing plate (71) or the inner push plate (75); The housing (72) is connected to the first heat dissipation frame (41); the first end of the housing (72) is disposed inside the cavity of the first heat dissipation frame (41), and the second end of the housing (72) is disposed inside the airbag (3); Under normal conditions, the outer sealing plate (71) abuts against the first end of the housing (72); under depressurized conditions, the outer sealing plate (71) moves away from the first end of the housing (72).

6. The chemical oxygen-generating respirator according to claim 5, characterized in that, The chemical oxygen-generating respirator also includes an air intake valve (8); the air intake valve (8) includes an outer cover plate (81), a valve body (82), a connecting rod (83), a second spring (84), and an inner cover plate (85); One end of the connecting rod (83) is connected to the outer cover plate (81), and the other end is connected to the inner cover plate (85); the second spring (84) is sleeved on the connecting rod (83); the valve body (82) is disposed between the outer cover plate (81) and the inner cover plate (85); one end of the second spring (84) is connected to the inner wall of the valve body (82), and the other end is connected to the outer cover plate (81) or the inner cover plate (85) respectively; The valve body (82) is connected to the second heat sink frame (42); the first end of the valve body (82) is located inside the cavity of the second heat sink frame (42), and the second end of the valve body (82) is located inside the airbag (3); Under normal conditions, the inner cover plate (85) abuts against the second end of the valve body (82); under negative pressure conditions, the inner cover plate (85) is away from the second end of the valve body (82).

7. The chemical oxygen-generating respirator according to claim 6, characterized in that, Both the outer cover plate (81) and the inner push plate (75) are provided with multiple through holes (811); the through holes (811) can communicate with the valve body (82) or the housing (72).

8. The chemical oxygen-generating respirator according to claim 6, characterized in that, The chemical oxygen-generating respirator also includes a pair of filter components (9) corresponding to the first heat dissipation frame (41) and the second heat dissipation frame (42); the filter components (9) include a sleeve (91) and a filter layer (92); One end of the sleeve (91) is filled with the filter layer (92), and the other end is detachable from the first heat dissipation frame (41) or the second heat dissipation frame (42). The outer sealing plate (71) or the outer cover plate (81) is located inside the sleeve (91).

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