Filtering type air supply breathing device for forest fire prevention

Abstract

The utility model provides a filtering type air supply breathing device for forest fire prevention. The filtering type air supply breathing device comprises an air bypass interphone, a chest strap, a host, an air supply pipe, a neck strap, an exhalation valve, a filtering piece and a mask. Wherein the mask is used for being matched with the face of a user; the host is connected with the mask through at least two air supply pipes and is used for actively supplying air to a user wearing the mask; the exhalation valve is arranged on the mask and used for exhausting gas exhaled by the user; the air bypass interphone is arranged on the mask and is used for enabling the user to communicate with the outside conveniently and enabling the user and the outside to be switched between an isolation state and a communication state; the filtering part is arranged at the gas inlet end of the main machine and used for filtering gas entering the main machine. The host is used for actively supplying air, the use comfort is further improved, and the applicability is improved through the air bypass interphone.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of individual respiratory protection equipment for forest firefighters, in particular to a filtering air supply breathing device for forest fire prevention. BACKGROUND

[0002] Forest fires are sudden, destructive and dangerous. Firefighters must shuttle in rugged mountainous areas, perform long, high-intensity and extremely dangerous operations, and in the first line of fire fighting, not only have to face high temperature and open fire, but also have to endure the invasion of toxic gases and smoke. In order to ensure the safety and health of forest firefighters, it is particularly important to use suitable individual respiratory protection equipment.

[0003] The oxygen concentration in the forest fire fighting environment meets the oxygen concentration required by human body breathing most of the time. The environmental air after filtering out gaseous and solid pollutants in the forest fire scene can fully meet the normal breathing of firefighters in most fire fighting time.

[0004] Currently, the individual protection equipment equipped for forest firefighters mainly includes smoke masks, gas masks and air breathing apparatuses, which have certain limitations when dealing with the special needs of forest fires. The filtering efficiency of the smoke mask is low, which is not enough to efficiently filter out harmful gases and particulate matter; the gas mask can provide higher level protection, but its high respiratory resistance cannot adapt to the breathing intensity of firefighters; and the air breathing apparatus is too heavy, which brings inconvenience to the movement of firefighters, and its limited use time also limits the continuity of fire fighting operations.

[0005] At present, there is no individual respiratory protection equipment specially used for forest fire fighting and disposal scenes, which can simultaneously meet the requirements of applicability, comfort and safety.

[0006] Therefore, a filtering air supply breathing device for forest fire prevention that meets the requirements of applicability, comfort and safety is urgently needed. CONTENT OF THE INVENTION

[0007] In order to solve the problems in the prior art, the present disclosure provides a filtering air supply breathing device for forest fire prevention, which can solve at least one technical problem in the prior art.

[0008] The specific technical scheme of the present disclosure is:

[0009] A filtering air supply breathing device for forest fire prevention, comprising:

[0010] a mask for use with the face of a user;

[0011] a main machine connected with the mask through a gas supply pipe, for actively supplying air to the user wearing the mask;

[0012] An exhalation valve, located on the mask, is used to expel the user's exhaled air;

[0013] An air bypass intercom is mounted on the mask to facilitate the user's external communication and to allow the user to switch between an isolated state and a connected state with the outside world.

[0014] A filter element is installed at the air inlet of the main unit to filter the gas entering the main unit.

[0015] The host includes:

[0016] Main unit casing;

[0017] The battery pack is housed within the main unit casing;

[0018] An air supply unit is disposed inside the main unit housing and is electrically connected to the battery pack;

[0019] A control unit, electrically connected to the air supply unit and disposed inside the main unit housing, is used to control the start and stop of the air supply unit;

[0020] The air inlet end of the main unit housing is provided with a filter interface;

[0021] The air outlet end of the main unit housing is provided with an air supply pipe interface.

[0022] The air bypass intercom includes:

[0023] A base; the side wall of the base is provided with a through hole for ventilation;

[0024] A communication component, movably mounted within the base, is used for communicating with the outside world;

[0025] An elastic element is disposed between the communication component and the base, and is used to seal the through hole through the communication component when the elastic element is compressed.

[0026] A rotation limiting component is disposed on the outside of the base to limit the communication component. When the rotation limiting component rotates, the elastic element pushes the communication component out of the base so that the through hole can communicate with the outside and realize the air bypass function.

[0027] The rotation limiting component includes:

[0028] At least one connector is provided on the base;

[0029] A resilient pin is provided on the connector;

[0030] A torsion spring is mounted on the elastic pin;

[0031] The snap-lock is rotatably mounted on the elastic pin;

[0032] One end of the torsion spring contacts the connector, and the other end contacts the push-button buckle;

[0033] The end of the press buckle is provided with a limit structure for limiting the position of the communication component.

[0034] The press-fit buckle includes:

[0035] Press the buckle body;

[0036] A connecting protrusion is provided on the press-fit buckle body;

[0037] A limiting protrusion is provided at the end of the pressing buckle body to form the limiting structure;

[0038] The connecting protrusion is provided with a shaft hole for mounting the elastic pin.

[0039] The call component includes:

[0040] The communicator housing is connected to the base;

[0041] A transceiver diaphragm, disposed inside the transceiver housing, is used for external amplification;

[0042] A cover for the intercom is disposed inside the intercom housing and is used to fix the intercom membrane.

[0043] The elastic element is located between the communicator housing and the communicator cover, and is used to allow the communicator housing to detach from the base so that the through hole can communicate with the outside.

[0044] The communicator cover includes:

[0045] The communicator cover body is located on the side of the communicator membrane away from the communicator housing;

[0046] A pressure cover extension is disposed away from the transceiver membrane and is used to form a space for placing the elastic element between the pressure cover extension and the transceiver housing;

[0047] The communicator cover body is detachably connected to the communicator shell.

[0048] The communicator housing includes:

[0049] The receiver housing body is located on the side of the receiver diaphragm facing the outside.

[0050] A first extension is disposed toward the communicator membrane and is used to fix the communicator membrane;

[0051] The second extension is movably disposed within the base;

[0052] The second extension has a fixing protrusion on the side facing the telephone cover for detachable connection with the telephone cover;

[0053] The second extension is provided with an anti-detachment structure on the side facing the base to prevent the communicator housing from detaching from the base.

[0054] The base includes:

[0055] Base body;

[0056] A base extension is provided on the side of the base body near the communication component;

[0057] The base extension is provided with anti-detachment protrusions to prevent the communication component from detaching from the base extension;

[0058] The through hole is provided on the base extension.

[0059] Beneficial effects:

[0060] This disclosure provides active airflow to the user by connecting a face mask to the main unit via an air supply pipe. An exhalation valve is installed on the face mask to expel the user's exhaled air. An air bypass intercom is also installed on the face mask to facilitate communication, sealing the user from the outside environment when air quality is poor and allowing communication when the environment permits. Finally, a filter is installed at the air inlet of the main unit to filter the air entering the unit. This disclosure utilizes the main unit's active airflow to further enhance user comfort. Furthermore, the air bypass intercom allows for direct breathing of fresh air without removing the equipment. In the event of a sudden fire or smoke intrusion, the air bypass device can be immediately shut off, improving breathing comfort, extending the overall lifespan of the equipment, enhancing adaptability, and further improving user comfort. Attached Figure Description

[0061] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0062] Figure 1 This is a schematic diagram of the structure of the forest fire prevention filter-type air-supplying breathing device proposed in the embodiments of this disclosure;

[0063] Figure 2 for Figure 1 A schematic diagram of the host's structure;

[0064] Figure 3 for Figure 1 Exploded view of the gas bypass intercom in the middle;

[0065] Figure 4 for Figure 3 A schematic diagram of the air bypass intercom when the air bypass function is turned off;

[0066] Figure 5 for Figure 3 A schematic diagram of the air bypass intercom when the air bypass function is activated;

[0067] Figure 6 for Figure 3 A diagram illustrating the push-button mechanism;

[0068] Figure 7 for Figure 3 A schematic diagram of the structure of the intercom cover;

[0069] Figure 8 for Figure 7 Enlarged view of point E in the image;

[0070] Figure 9 for Figure 3 A schematic diagram of the structure of the intercom housing;

[0071] Figure 10 for Figure 9 Enlarged view of point F in the image;

[0072] Figure 11 for Figure 9 Enlarged view of point H in the image.

[0073] exist Figures 1-11 middle:

[0074] 1. Air bypass intercom; 2. Chest strap; 3. Main unit; 4. Air supply tube; 5. Neck strap; 6. Exhalation valve; 7. Filter; 8. Mask; 101. Base; 102. Sealing ring; 103. Torsion spring; 104. Elastic pin; 105. Press-button buckle; 106. Elastic element; 107. Intercom cover; 108. Intercom housing; 109. Intercom diaphragm; 1010. Connector; 101A. Through hole; 1011. Base body; 1012. Base extension; 1012A. Anti-detachment protrusion; 1051. Press-fit buckle body; 1052. Connecting protrusion; 1053. Limiting protrusion; 1052A. Shaft hole; 1071. Communicator cover body; 1072. Cover extension; 1071A. Fitting part; 1081. Communicator housing body; 1082. First extension; 1083. Second extension; 1083A. Fixing protrusion; 101B. Connecting component; 1083B. Anti-detachment structure. Detailed Implementation

[0075] Various embodiments of this disclosure will be described more fully below. This disclosure may have various embodiments, and adjustments and changes may be made therein. However, it should be understood that there is no intention to limit the various embodiments of this disclosure to the specific embodiments disclosed herein, but rather this disclosure should be understood to cover all adjustments, equivalents, and / or alternatives falling within the spirit and scope of the various embodiments of this disclosure.

[0076] In the following, the terms “comprising” or “may include”, which may be used in various embodiments of this disclosure, indicate the presence of the disclosed functions, operations, or elements, and do not limit the addition of one or more functions, operations, or elements. Furthermore, as used in various embodiments of this disclosure, the terms “comprising,” “having,” and their cognates are intended only to indicate a particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be construed as primarily excluding the presence of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing, or the possibility of adding one or more combinations of the foregoing.

[0077] In various embodiments of this disclosure, the expression "or" or "at least one of A and / or B" includes any combination or all combinations of the words listed simultaneously. For example, the expression "A or B" or "at least one of A and / or B" may include A, may include B, or may include both A and B.

[0078] The terms used in the various embodiments of this disclosure (such as "first," "second," etc.) may modify various components in the various embodiments, but do not limit the corresponding components. For example, the above terms do not limit the order and / or importance of the components. The above terms are only used for the purpose of distinguishing one component from others. For example, a first user device and a second user device refer to different user devices, although both are user devices. For example, a first component may be referred to as a second component without departing from the scope of the various embodiments of this disclosure, and similarly, a second component may also be referred to as a first component.

[0079] It should be noted that if a description is made of "connecting" one component to another, then the first component can be directly connected to the second component, and a third component can be "connected" between the first and second components. Conversely, when a component is "directly connected" to another component, it can be understood that there is no third component between the first and second components.

[0080] The term "user" as used in various embodiments of this disclosure may refer to a person using an electronic device or a device using an electronic device (e.g., an artificial intelligence electronic device).

[0081] The terminology used in the various embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to limit the various embodiments of this disclosure. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of this disclosure pertain. Terms (such as those defined in a generally used dictionary) are to be interpreted as having the same meaning as in the context of the relevant technical field and are not to be interpreted as having an idealized or overly formal meaning, unless clearly defined in the various embodiments of this disclosure. Specific Implementation Example 1:

[0083] This disclosure provides an embodiment:

[0084] like Figure 1A forest fire prevention filtered breathing device includes: an air bypass intercom 1, a chest strap 2, a main unit 3, an air supply pipe 4, a neck strap 5, an exhalation valve 6, a filter element 7, and a face mask 8; wherein, the face mask 8 is used to fit the user's face; the main unit 3 is connected to the face mask 8 through two air supply pipes 4 for actively supplying air to the user wearing the face mask 8; the exhalation valve 6 is disposed on the face mask 8 for expelling the gas exhaled by the user; the air bypass intercom 1 is disposed on the face mask 8 for facilitating communication between the user and the outside world, and for switching the user between an isolated state and a connected state; the filter element 7 is disposed at the air inlet of the main unit 3 for filtering the gas entering the main unit 3. The chest strap 2 is mounted on the main unit 3 and is used to fix the main unit 3 to the user's chest position; the neck strap 5 is mounted on the main unit 3 and is located on the side of the chest strap 2 near the mask 8, and is used to fix the main unit 3 to the user's neck position, so that the forest fire prevention filter-type air-supplying breathing device described in this embodiment is worn on the user's chest.

[0085] In this embodiment, as Figure 2 The main unit 3 includes: a main unit housing 301, a battery pack 302, an air supply unit 303, a filter interface 304, a control unit 305, and an air supply pipe interface 306; wherein, the battery pack 302 is disposed within the main unit housing 301; the air supply unit 303, such as a fan, is disposed within the main unit housing 301 and electrically connected to the battery pack 302; the control unit 305, such as a microcontroller, is electrically connected to the air supply unit 303 and disposed within the main unit housing 301, and is used to control the start / stop and / or speed of the air supply unit 303; the air inlet end of the main unit housing 301 is provided with a filter interface 304; the air outlet end of the main unit housing 301 is provided with an air supply pipe interface 306; preferably, the filter interface 304 is threadedly connected to the filter 7; the air supply pipe interface 306 is connected to the air supply pipe 4 through a pipe clamp, introducing filtered powered air into the mask 8 for the user to breathe. Furthermore, a partition can be installed inside the main housing 301 to isolate the air inlet and outlet of the fan, ensuring unidirectional airflow.

[0086] The mask 8 includes a face shield, an exhalation valve 6 is provided at the lower part of the face shield near the mouth to expel the user's exhaled air from the face shield, and an air bypass intercom 1 is provided in the middle of the face shield for external amplification communication, and can also be turned on when the ambient air is safe to allow the user to breathe fresh air.

[0087] Specifically, such as Figure 3An air bypass intercom 1 includes: a base 101, a sealing ring 102, a communication component, an elastic element 106, and a rotation limiting component; wherein, the side wall of the base 101 is provided with a through hole 101A for ventilation; the sealing ring 102 is disposed between the base 101 and the communication component; the communication component is movably disposed within the base 101 for communicating with the outside world; the elastic element 106, such as a spring, is disposed between the communication component and the base 101; to prevent harmful gases, such as smoke, After entering the base 101, the communication component seals the through hole 101A after compressing the elastic member 106. Furthermore, after compressing the elastic member 106, a rotation limiting component is used to limit the movement to prevent rebound. This rotation limiting component is located on the outside of the base 101 and is used to limit the communication component. When the rotation limiting component rotates, the elastic member 106 pushes the communication component out of the base 101, so that the through hole 101A is connected to the outside, realizing the air bypass function.

[0088] In this embodiment, in addition to serving as a fixed intercom component, the base 101 also needs to provide air bypass. Therefore, preferably, the base 101 includes: a base body 1011 and a base extension 1012; wherein, the base extension 1012 is disposed on the side of the base body 1011 near the intercom component; the base extension 1012 is provided with an anti-detachment protrusion 1012A inside to prevent the intercom component from detaching from the base extension 1012; and the through hole 101A is disposed on the base extension 1012.

[0089] Specifically, to improve operability, the rotation limiting component, such as Figure 4 and 5 The device includes: two connectors 1010, a torsion spring 103, an elastic pin 104, and a press-fit buckle 105; wherein, the two connectors 1010 are symmetrically arranged on the base 101; the elastic pin 104 is arranged on the connector 1010; the torsion spring 103 is arranged on the elastic pin 104; the press-fit buckle 105 is connected to the elastic pin 104 and then arranged on the connector 1010, and the press-fit buckle 105 can rotate around the elastic pin 104; one end of the torsion spring 103 contacts the connector 1010, and the other end contacts the press-fit buckle 105; the end of the press-fit buckle 105 is provided with a limit structure for limiting the communication component and preventing the elastic element 106 from rebounding.

[0090] Specifically, in this embodiment, such as Figure 6The press-fit buckle 105 includes: a press-fit buckle body 1051, a connecting protrusion 1052, and a limiting protrusion 1053; wherein, the connecting protrusion 1052 is disposed on the press-fit buckle body 1051; the limiting protrusion 1053 is disposed at the end of the press-fit buckle body 1051 to form the limiting structure; the connecting protrusion 1052 is provided with a shaft hole 1052A for accommodating the elastic pin 104.

[0091] During use, if the elastic element 106 is compressed, the communication component seals the through hole 101A and is fixed by the limiting protrusion 1053 at the end of the pressing buckle body 1051, preventing the elastic element 106 from rebounding and ensuring that the communication component always seals the through hole 101A. This prevents external smoke or other harmful gases from entering the base 101 through the through hole 101A and thus into the fire mask, causing harm to the human body. When air bypass is required, the pressing buckle body 1051 needs to be pressed manually, causing it to apply pressure to the torsion spring 103, causing it to deform. This causes the pressing buckle body 1051 to rotate around the elastic pin 104, displacing the limiting protrusion 1053 on the pressing buckle body 1051, and finally disengaging from the communication component. The elastic element 106 resets, and the communication component moves away from the through hole 101A, allowing the base 101 to ventilate with the outside, thus realizing the air bypass function.

[0092] The call component described in this embodiment needs to meet the amplification requirements, such as... Figure 1 Specifically, it includes: a microphone cover 107, a microphone housing 108, and a microphone diaphragm 109; wherein, the microphone housing 108 is connected to the base 101; the microphone diaphragm 109 is disposed inside the microphone housing 108 for external amplification; the microphone cover 107 is disposed inside the microphone housing 108 for fixing the microphone diaphragm 109; to facilitate fixing, the elastic member 106 is located between the microphone housing 108 and the microphone cover 107, for allowing the microphone housing 108 to detach from the base 101 so that the through hole 101A communicates with the outside.

[0093] Specifically, such as Figure 7 The communicator cover 107 includes: a cover body 1071 and a cover extension 1072; wherein, the cover body 1071 is disposed on the side of the communicator membrane 109 away from the communicator housing 108; the cover extension 1072 is disposed away from the communicator membrane 109, and is used to form a space for placing the elastic element 106 between the cover extension 1072 and the communicator housing 108; both the cover body 1071 and the communicator housing 108 are provided with annular protrusions, and when installation is required, the two annular protrusions are fastened together to form a detachable structure, such as...Figure 8 At point S in the diagram.

[0094] To facilitate compatibility with the communicator cover 107, such as Figure 9 The communicator housing 108 includes: a housing body 1081, a first extension 1082, and a second extension 1083; wherein, the housing body 1081 is disposed on the side of the communicator diaphragm 109 facing outward; the first extension 1082 is disposed towards the communicator diaphragm 109 for fixing the communicator diaphragm 109; the second extension 1083 is movably disposed within the base 101; as shown... Figure 10 and 11 The second extension 1083 is provided with a fixing protrusion 1083A on the side facing the communicator cover 107, for detachable connection with the mating part 1071A at the end of the communicator cover body 1071; the second extension 1083 is provided with an anti-detachment structure 1083B on the side facing the base 101, for cooperating with the anti-detachment protrusion 1012A to prevent the communicator housing 108 from being detached from the base 101.

[0095] To improve call quality, both the communicator housing body 1081 in the communicator housing 108 and the communicator cover body 1071 in the communicator cover 107 are provided with evenly distributed holes for sound transmission. For easy connection, the outer side of the base 101 is provided with a connecting component 101B that can be detachably connected to the face mask 8, such as a slot or buckle.

[0096] In actual production, the intercom diaphragm 109 can be made of a fire-retardant thin-film elastic material, providing good sound transmission and effectively preventing damage to the device caused by high temperatures and flying sparks. Meanwhile, the base 101, the intercom cover 107, and the intercom shell 108 can all be made of flame-retardant materials to improve fire resistance and ensure safe use. Furthermore, this embodiment integrates an air bypass function into the intercom component, increasing the number of mask functions and improving the user experience.

[0097] In this embodiment, when worn, it is secured to the user's chest via the waist belt 2 and neck strap 5. When the air supply unit 303 is activated, dense smoke enters the filter element 7, such as a filter canister. The filtered air enters the main unit 3 and, after being processed by the air supply unit 303, enters the mask 8 along the air supply pipe 4 for the user to breathe. Finally, it is expelled through the exhalation valve 6. When fresh air is needed, the buckles 105 on both sides of the air bypass intercom 1 are pressed, and the air bypass intercom 1 pops up from the base 101, allowing air to enter the mask 8 through the through hole 101A. When dense smoke needs to be filtered, the intercom cover 107 is directly pressed down, pressing it against the sealing ring 102 and securing it with the buckles 105 to ensure a seal.

[0098] In practice, the forest fire prevention filter-type air-supplying breathing device described in this embodiment has been used in forest fire prevention. Based on site visits and investigations, the characteristics of this embodiment include:

[0099] In existing forest fire prevention processes, forest firefighters need to carry wind-powered fire extinguishers on their backs, which is very inconvenient. This embodiment, however, uses a chest strap 2 and a neck strap 5 to secure the equipment to the firefighter's chest, improving the equipment's convenience and compatibility. Furthermore, considering the physical exertion of forest firefighters, their breathing needs, and the overall weight of the equipment, such as... Figure 1 This embodiment employs dual filters (7) and dual air supply pipes (4) to minimize airflow resistance in the air path, thereby reducing fan energy consumption and inhalation resistance. Furthermore, unlike traditional respirators with a single-pipe air supply, the additional air path in this embodiment effectively reduces wind speed, resulting in a more even and gentle air supply and improved comfort. If one of the air supply pipes (4) is accidentally bent and blocked, the system can continue supplying air using the other pipe, serving as a backup and enhancing safety. Finally, when forest firefighters are approaching the fire line, moving to a new position, or resting in a safe area, where the ambient air contains little smoke, they can use the air bypass communicator (1) in this embodiment to breathe fresh air directly without removing their equipment. If the fire suddenly intensifies and smoke arrives, the air bypass communicator can be immediately shut off, improving breathing comfort and extending the overall lifespan of the equipment.

[0100] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of a preferred embodiment, and the modules or processes shown in the drawings are not necessarily essential for implementing this disclosure.

[0101] Those skilled in the art will understand that the modules in the apparatus of the implementation scenario can be distributed within the apparatus of the implementation scenario as described, or they can be located in one or more apparatuses different from this implementation scenario, with corresponding changes. The modules of the above-described implementation scenario can be combined into one module, or they can be further divided into multiple sub-modules.

[0102] The serial numbers in this disclosure are for descriptive purposes only and do not represent the merits or demerits of the implementation scenario.

[0103] The above disclosure only discloses a few specific implementation scenarios. However, this disclosure is not limited to these. Any variations that can be conceived by those skilled in the art should fall within the protection scope of this disclosure.

Claims

1. A filter-type air-supplying breathing device for forest fire prevention, characterized in that, include: A face mask for use with the user's face; The main unit is connected to the mask via at least two air supply pipes and is used to actively deliver air to the user wearing the mask; An exhalation valve, located on the mask, is used to expel the user's exhaled air; An air bypass intercom is mounted on the mask to facilitate the user's external communication and to allow the user to switch between an isolated state and a connected state with the outside world. A filter element is installed at the air inlet of the main unit to filter the gas entering the main unit.

2. The forest fire prevention filter-type air-supplying breathing device according to claim 1, characterized in that, The host includes: Main unit casing; The battery pack is housed within the main unit casing; An air supply unit is disposed inside the main unit housing and is electrically connected to the battery pack; A control unit, electrically connected to the air supply unit and disposed inside the main unit housing, is used to control the start and stop of the air supply unit; The air inlet end of the main unit housing is provided with a filter interface; The air outlet end of the main unit housing is provided with an air supply pipe interface.

3. The forest fire prevention filter-type air-supplying breathing device according to claim 1, characterized in that, The air bypass intercom includes: A base; the side wall of the base is provided with a through hole for ventilation; A communication component, movably mounted within the base, is used for communicating with the outside world; An elastic element is disposed between the communication component and the base, and is used to seal the through hole through the communication component when the elastic element is compressed. A rotation limiting component is disposed on the outside of the base to limit the communication component. When the rotation limiting component rotates, the elastic element pushes the communication component out of the base so that the through hole can communicate with the outside and realize the air bypass function.

4. The forest fire prevention filter-type air-supplying breathing device according to claim 3, characterized in that, The rotation limiting component includes: At least one connector is provided on the base; A resilient pin is provided on the connector; A torsion spring is mounted on the elastic pin; The snap-lock is rotatably mounted on the elastic pin; One end of the torsion spring contacts the connector, and the other end contacts the push-button buckle; The end of the press buckle is provided with a limit structure for limiting the position of the communication component.

5. The forest fire prevention filter-type air-supplying breathing device according to claim 4, characterized in that, The press-fit buckle includes: Press the buckle body; A connecting protrusion is provided on the press-fit buckle body; A limiting protrusion is provided at the end of the pressing buckle body to form the limiting structure; The connecting protrusion is provided with a shaft hole for mounting the elastic pin.

6. The forest fire prevention filter-type air-supplying breathing device according to claim 3, characterized in that, The call component includes: The communicator housing is connected to the base; A transceiver diaphragm, disposed inside the transceiver housing, is used for external amplification; A cover for the intercom is disposed inside the intercom housing and is used to fix the intercom membrane. The elastic element is located between the communicator housing and the communicator cover, and is used to allow the communicator housing to detach from the base so that the through hole can communicate with the outside.

7. The forest fire prevention filter-type air-supplying breathing device according to claim 6, characterized in that, The communicator cover includes: The communicator cover body is located on the side of the communicator membrane away from the communicator housing; A pressure cover extension is disposed away from the transceiver membrane and is used to form a space for placing the elastic element between the pressure cover extension and the transceiver housing; The communicator cover body is detachably connected to the communicator shell.

8. The forest fire prevention filter-type air-supplying breathing device according to claim 6, characterized in that, The communicator housing includes: The receiver housing body is located on the side of the receiver diaphragm facing the outside. A first extension is disposed toward the communicator membrane and is used to fix the communicator membrane; The second extension is movably disposed within the base; The second extension has a fixing protrusion on the side facing the telephone cover for detachable connection with the telephone cover; The second extension is provided with an anti-detachment structure on the side facing the base to prevent the communicator housing from detaching from the base.

9. The forest fire prevention filter-type air-supplying breathing device according to claim 3, characterized in that, The base includes: Base body; A base extension is provided on the side of the base body near the communication component; The base extension is provided with anti-detachment protrusions to prevent the communication component from detaching from the base extension; The through hole is provided on the base extension.

10. The forest fire prevention filter-type air-supplying breathing device according to claim 1, characterized in that, Also includes: A chest strap, mounted on the main unit, is used to secure the main unit to the user's chest. A neck strap, mounted on the main unit and located on the side of the chest strap near the face mask, is used to secure the main unit to the user's neck.

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