A dust and toxic safety early warning breathing assistance system
Through its split design and real-time monitoring breathing assistance system, it solves the problems of weight-bearing comfort and purification efficiency of traditional breathing masks, achieving efficient and safe air purification and comfortable wear.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 烟台市丹叶环境科技有限公司
- Filing Date
- 2026-03-24
- Publication Date
- 2026-06-02
AI Technical Summary
Traditional breathing masks have an integrated design that leads to a significant conflict between wearing weight and comfort, an unreasonable air path that results in material waste and low purification efficiency, and a lack of real-time monitoring mechanisms that pose safety hazards.
The mask module, purification module, and monitoring module are designed in a split manner and are worn on the face and other parts of the body, respectively. The monitoring module has built-in sensors to detect air quality in real time and issue an alert when the filter material is saturated. The purification module adopts a split, standardized, and modular design to optimize the air filtration path.
It achieves efficient use of filter materials, real-time safety monitoring, and comfortable wear, reducing the user's breathing resistance and improving air purification quality and wearing stability.
Smart Images
Figure CN122124403A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of respiratory equipment, specifically to a dust and toxic substance safety early warning respiratory assistance system. Background Technology
[0002] Respiratory masks, as critical protective equipment ensuring normal breathing for personnel in harsh environments such as pollution, dust, and harmful gases, are widely used in many fields including industrial production, emergency rescue, outdoor operations, national defense and security, and public health. However, with the development of industry technology and the expansion of application scenarios, traditional respiratory masks have gradually revealed technical deficiencies in terms of structural design, functional adaptability, and user experience, making them unable to meet the complex protection needs of modern times. Specific problems include: (1) The integrated design of the mask has significant drawbacks, and the contradiction between wearing weight and comfort is prominent.
[0003] Traditional breathing masks mostly adopt an integrated design structure where the mask module and purification components are integrated into one unit, with all the purification filters installed on the mask body. This integrated layout significantly increases the overall weight of the mask, requiring the entire weight to be applied directly to the user's face when wearing it, which cannot guarantee comfort and safety over a long period of time.
[0004] (2) The air path is unreasonable, resulting in serious waste of materials.
[0005] Traditional purification modules lack targeted air guidance design. Air mostly passes directly through the filter material in a straight line, resulting in a short contact path and limited contact area. This causes some filter materials to reach saturation before fully utilizing their function, while other areas are overloaded for extended periods. This leads to a serious waste of filter material resources and reduces overall purification efficiency.
[0006] (3) Lack of real-time monitoring mechanism poses hidden dangers to respiratory safety. Most traditional breathing masks lack intelligent monitoring systems, making it impossible to monitor the status of the filter material and the quality of air purification in real time. Users may not be able to determine whether the filter material has reached saturation and become ineffective, and may unknowingly use a malfunctioning filter module, inhaling substandard and polluted air, thus posing respiratory safety risks and increasing the risk of occupational diseases. Summary of the Invention
[0007] To address the technical problems of existing breathing masks, such as high integration, unreasonable filtration paths, and lack of early warning systems, this invention provides a dust and toxic substance safety early warning breathing assistance system.
[0008] To achieve the above objectives, the present invention discloses a dust and toxic substance safety early warning respiratory assistance system, comprising: A face mask module, the face mask module including a mask body that fits the user's face and forms a closed space, the mask body having a first inlet and a first outlet; The purification module includes a first filter module and / or a second filter module, wherein the first filter module is filled with a first filter material and the second filter module is filled with a second filter material; the first filter module and the second filter module are each detachable. The monitoring module has a built-in first flow channel, one end of which forms a second inlet and the other end of which forms a second outlet; the monitoring module is detachably connected to either a first filter module or a second filter module; the second outlet is connected to the first inlet via a pipe; the monitoring module is equipped with sensors for monitoring the working status of the first filter module and the second filter module. The air passes through the purification module and the monitoring module in sequence before entering the enclosed space formed between the mask and the user's face.
[0009] Preferably, the first filter module includes a first outer shell and a first partition. The first partition is connected to the inner cavity of the first outer shell and divides the inner cavity of the first outer shell into a first chamber and a second chamber. The first chamber and the second chamber are respectively filled with a first filter material. The first filter module is provided with a through second flow channel, and the second chamber communicates with the second flow channel. One side of the first chamber and the first partition are provided with a perforated structure for air to pass through. Air enters the inner cavity of the first outer shell through the perforated structure and flows out through the second flow channel.
[0010] Preferably, the second filter module includes a second housing, a third inlet is provided on one side of the second housing, and a third outlet is provided on the other side of the second housing; a dispersion plate is connected to the inner cavity of the second housing near the third inlet; air enters its inner cavity after being dispersed by the guide channel through the third inlet and flows out to the third outlet.
[0011] Preferably, the detachable structure is divided into a substructure and a parent structure that cooperate with each other, the first filter module and the second filter module have at least a substructure, and the monitoring module has a parent structure.
[0012] Preferably, the first filter module, the second filter module, and the monitoring module having the parent structure are connected with sealing rings to ensure the sealing performance when the substructure and the parent structure are connected.
[0013] Preferably, the purification module includes at least two detachably connected first filter modules, wherein one of the first filter modules has a substructure, and the other first filter module has both a substructure and a parent structure; the second flow channels of the at least two first filter modules are interconnected.
[0014] Preferably, the purification module includes at least one first filter module and at least one second filter module. The first filter module has a substructure, and the second filter module has both a substructure and a parent structure. The flow channel of the first filter module is connected to the third inlet of the second filter module.
[0015] Preferably, the monitoring module is connected to a negative pressure fan, which draws the air filtered by the first and / or second filter modules into the enclosed space formed between the cover and the user's face.
[0016] Preferably, a first one-way valve plate and a second one-way valve plate are connected at parallel intervals at the first outlet; in the first direction, the bottom end of the first one-way valve plate is fixedly connected to the cover, and the top end of the second one-way valve plate is fixedly connected to the cover.
[0017] Preferably, the first filter material is filter cotton, and the second filter material is activated carbon.
[0018] The present invention has the following technical effects: (1) Intelligent real-time monitoring enables proactive early warning of filter failure, ensuring respiratory safety.
[0019] The monitoring module incorporates dedicated sensors to monitor the air quality after filtration in real time, accurately determining whether the filter material has reached saturation and failure. When the air quality falls below a safe threshold and the filter module loses its effective purification capacity, the monitoring module will illuminate an indicator light and sound an audible alarm, providing a clear and immediate warning to the user. This prevents users from unknowingly inhaling substandard air, completely resolving the safety hazards of traditional gas masks that cannot monitor filtration effectiveness in real time and whose filtration failure is difficult to detect. Simultaneously, the monitoring module has a built-in negative pressure fan that actively delivers purified air to the enclosed space of the mask, providing auxiliary breathing power and reducing resistance to the user's breathing. This is particularly suitable for people with breathing difficulties and for high-intensity work scenarios, balancing safety and ease of breathing.
[0020] (2) The purification module is a separate optional unit with a flexible structure and high adaptability.
[0021] In this solution, the purification module adopts a split, standardized, and modular design, breaking the limitations of fixed filter structures in gas masks that cannot be selected as needed. Different functions and specifications of filter modules can be flexibly selected and combined according to the type of pollution, protection level, and ventilation requirements of the actual use scenario.
[0022] (3) Significantly improves wearing comfort and reduces the risk of slippage and fatigue from heavy loads.
[0023] This solution adopts a split layout for core components, separating the mask module from the purification module and the monitoring module. It abandons the conventional design of integrating all purification components into the mask module in existing technologies. Only the mask module is retained to fit the user's face to complete the basic sealing and breathing conduction functions. The purification module and the monitoring module are worn on other parts of the body with independent straps, completely eliminating the extra weight of the mask module.
[0024] (4) Optimize the air filtration path to maximize the utilization rate of filter materials and the purification effect.
[0025] The first filter module extends the contact path and contact area between air and the first filter material by adding a first baffle, avoiding the waste of resources caused by air directly passing through the filter material in a short time, allowing the first filter material to fully play its interception role and greatly improving the utilization rate of the first filter material.
[0026] The second filter module features a dispersion disc and radial guide channel structure. After entering the inner cavity, the air is blocked by the dispersion disc and evenly dispersed along the guide channel to the entire inner cavity of the second outer shell, rather than being concentrated and directly impacting a localized filtration area. This ensures that the activated carbon filter material is in uniform contact with the air throughout the entire area, solving the problem of localized material overload and idle material in traditional filter modules. It fully utilizes the odor adsorption and toxic gas purification functions of activated carbon, making the two-stage filtration more efficient and significantly improving the overall air purification quality. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the mask module in this invention; Figure 3 This is a cross-sectional view of the mask module in this invention; Figure 4 This is a schematic diagram of the structure of one type of first filtering module from a first angle; Figure 5 This is a schematic diagram of the structure of one type of first filtering module from a second angle; Figure 6 This is a cross-sectional view of the structure of the first filtering module in this invention; Figure 7 This is a schematic diagram of another type of first filtering module from the first angle. Figure 8 This is a schematic diagram of another type of first filter module from a second angle; Figure 9 This is a schematic diagram of the structure of the second filtering module from the first angle; Figure 10 This is a schematic diagram of the structure of the second filtering module from the second angle. Figure 11 This is a cross-sectional view of the structure of the second filtering module in this invention; Figure 12 This is a schematic diagram of the structure of one inner side of the second filtering module in this invention; Figure 13 This is a schematic diagram of the monitoring module in this invention; Figure 14 This is a schematic diagram showing the connection between the purification module and the monitoring module in this invention; Figure 15 for Figure 14 A structural sectional view.
[0028] In the diagram, 100. Face mask module; 101. Mask body; 102. First inlet; 103. First outlet; 104. First one-way valve; 105. Second one-way valve; 200. Purification module; 201. First filtration module; 201a. First outer shell; 201b. First partition; 201c. First chamber; 201d. Second chamber; 201e. Second flow channel; 202. Second filtration module; 202a. Second outer shell; 202b. Third inlet; 202c. Third outlet; 202d. Dispersion plate; 202e. Flow guide channel; 203. Detachable structure; 203a. Substructure; 203b. Main structure; 300. Monitoring module; 301. First flow channel; 302. Second inlet; 303. Second outlet; 304. Negative pressure fan; 400. Sealing ring. Detailed Implementation
[0029] The following is in conjunction with the appendix Figure 1 To be continued Figure 15 The embodiments describe the principles and features of the present invention; the examples given are only for explaining the present invention and are not intended to limit the scope of the present invention. The first direction described below is an appendix. Figure 3 The X direction in the equation.
[0030] A dust and toxic gas safety early warning breathing assistance system includes a mask module 100, a purification module 200, and a monitoring module 300. The mask module 100 is fixed to the user's head or neck with straps, while the purification module 200 and monitoring module 300 are worn on the rest of the user's body with straps. This allows the mask module 100 to be separated from the purification module 200 and monitoring module 300. On the one hand, the overall weight of the mask module 100 is significantly reduced, preventing pressure from excessive weight when it fits the face, and avoiding discomfort such as facial soreness or marks from prolonged wear, making it suitable for continuous wear in various scenarios such as long-term work and outdoor travel. On the other hand, the lightweight mask module 100 fits the face more securely, effectively avoiding the displacement and slippage problems caused by the weight of traditional heavy-duty masks, ensuring that the space formed by the mask and face remains sealed, preventing leakage of unpurified air, and significantly improving the wearer's freedom of movement, without restricting head movement or limb movements due to the weight of the mask.
[0031] See attached document Figure 2 and attached Figure 3 The mask module 100 includes a mask body 101, which fits against the user's face and forms a closed space. The fit between the mask body 101 and the user's face should meet ergonomic design requirements. Air passes sequentially through the purification module 200 and the monitoring module 300 before entering the closed space formed by the mask body 101 and the user's face. The mask body 101 has a first inlet 102 and a first outlet 103, both of which communicate with the closed space. Purified air enters the closed space through the first inlet 102, while the user's exhaled air is discharged through the first outlet 103. A first one-way valve plate 104 and a second one-way valve plate 105, which are parallel and spaced apart, are connected to the first outlet 103, forming an S-shaped air outlet. Specifically, in the first direction, the bottom end of the first one-way valve plate 104 is fixedly connected to the mask body 101, and the top end of the second one-way valve plate 105 is fixedly connected to the mask body 101. The first one-way valve plate 104 and the second one-way valve plate 105 form a structure with one-way valve function. The exhaust gas exhaled by the user can smoothly push up the first one-way valve plate 104 and the second one-way valve plate 105 and discharge it to the outside. Meanwhile, the unfiltered polluted air outside cannot pass through the second one-way valve plate 105 and the first one-way valve plate 104 in reverse to enter the closed space, thus completely blocking the entry of polluted air from the exhaust end.
[0032] See attached document Figure 4 To be continued Figure 12The purification module 200 includes a first filtration module 201 and a second filtration module 202. The first filtration module 201 is filled with a first filter material, and the second filtration module 202 is filled with a second filter material. The first and second filter materials can be any type available on the market. To achieve a combined purification effect, in this embodiment, the first and second filter materials use different filter media; specifically, the first filter material is filter cotton, and the second filter material is activated carbon.
[0033] The first filter module 201 includes a first housing 201a and a first partition 201b. To facilitate replacement of the first filter material, the first housing 201a includes two parts secured by snap-fits; the first filter material can be replaced by disassembling the two parts. The first partition 201b is connected to the inner cavity of the first housing 201a and divides the inner cavity of the first housing 201a into a first chamber 201c and a second chamber 201d, for... Figure 6 As shown in the diagram, the first chamber 201c is located above the second chamber 201d. The first chamber 201c and the second chamber 201d are respectively filled with a first filter material. One side of the first outer shell 201a and the first partition 201b are provided with perforated structures to allow air to pass through. A second flow channel 201e is provided at the center of the first outer shell 201a, connecting both sides. The first chamber 201c is isolated from the second flow channel 201e, while the second chamber 201d is connected to the second flow channel 201e. See Appendix. Figure 6 Using arrows to indicate the airflow direction, air enters the first chamber 201c after passing through the perforated structure of the first outer shell 201a. Since the first chamber 201c is not connected to the second flow channel 201e, the air continues to pass through the first partition 201b into the second chamber 201d and then converges and discharges into the second flow channel 201e. Based on this design, the contact path and contact area between the air and the first filter material are extended throughout the process, avoiding resource waste caused by short-term direct airflow. This allows the first filter material to fully exert its particle interception function, significantly improving the utilization rate and filtration efficiency of the first filter material.
[0034] This embodiment is equipped with two types of first filter modules 201 with different structural specifications. Both types of first filter modules 201 are adapted to standardized detachable and splicing requirements, and their specific structures and applicable scenarios are clearly distinguished: the structure of one type of first filter module 201 is shown in the attached figure. Figure 4 To be continued Figure 5 The module has a complete detachable structure 203 on both sides, wherein the detachable structure 203 is divided into a matching substructure 203a and a mother structure 203b. The substructure 203a and the mother structure 203b are respectively set on the two opposite side walls of the first filter module 201, which can realize bidirectional docking with other first filter modules 201; another structure of the first filter module 201 is shown in the attached figure. Figure 7 To be continued Figure 8 This module has a detachable structure 203 on only one side and only a substructure 203a, without a corresponding parent structure 203b. It is suitable for the end position of splicing module combinations, avoiding unnecessary exposed interfaces. This embodiment does not limit the number of first filter modules 201 used. Multiple sets of first filter modules 201 can be stacked and spliced together by relying on the detachable structure 203. After stacking, the first filter modules 201 are connected in parallel. The more stacked, the larger the overall air intake perforation area, and the air inflow is increased accordingly, which can adapt to the usage scenarios with high breathing load and high ventilation volume requirements.
[0035] The second filtration module 202 includes a second housing 202a. A third inlet 202b is located on one side of the second housing 202a, and a third outlet 202c is located on the other side. The third inlet 202b is connected to the second flow channel 201e. Air filtered by the first filtration module 201 enters the inner cavity of the second housing 202a through the second flow channel 201e. A dispersion disk 202d is connected to the inner cavity of the second housing 202a near the third inlet 202b, and a guide channel 202e is provided. After the air flows in through the third inlet 202b, it is obstructed by the dispersion disk 202d and dispersed radially along the guide channel 202e, dispersing the air throughout the entire inner cavity of the second housing 202a, thereby ensuring full utilization of the second filter material and improving its utilization rate. The air filtered by the second filter material converges and flows out through the third outlet 202c. The second filter module 202 also has a detachable structure 203, which includes a substructure 203a and a mother structure 203b. The substructure 203a is used to connect to the monitoring module 300, and the mother structure 203b is used to connect to the first filter module 201. This embodiment does not limit the number of second filter modules 202; any number of second filter modules 202 can be stacked on top of each other, and the stacked second filter modules 202 are in series. That is, the more second filter modules 202 are stacked, the better the air purification effect. Users can select the number of first filter modules 201 and the number of second filter modules 202 according to the actual usage environment. Specifically, for environments primarily polluted by dust and particulate matter, the first filter module 201 can be selected alone to achieve efficient particle interception; for environments with odors, toxic and harmful gases, or complex pollution, the second filter module 202 can be used to achieve dual purification; for scenarios requiring high ventilation volume, multiple sets of the first filter module 201 can be connected in parallel; for scenarios requiring high purification levels, multiple sets of the second filter module 202 can be connected in series, truly realizing customized selection of filtration functions, adapting to diverse usage needs, and meeting different protection scenarios without replacing the entire unit.
[0036] The monitoring module 300 has a parent structure 203b in the detachable structure 203, and is detachably connected to the first filter module 201 or the second filter module 202. The monitoring module 300 has a built-in first flow channel 301, one end of which forms a second inlet 302, and the other end forms a second outlet 303. The second inlet 302 is connected to a third outlet 202c, and the second outlet 303 is connected to the first inlet 102 via a pipe. The monitoring module 300 has a built-in sensor to detect the purification quality of the air passing through the purification module 200. When the air quality reaches the sensor's safety threshold, the monitoring module 300 will alert the user via an indicator light and a buzzer to indicate filter failure and prompt timely replacement of the purification module 200. A negative pressure fan 304 is also connected within the monitoring module 300. The negative pressure fan 304 draws the air filtered by the first filter module 201 and the second filter module 202 into the enclosed space formed between the hood 101 and the user's face, thus assisting the user's breathing.
[0037] The first filter module 201, the second filter module 202, and the monitoring module 300, which have a parent structure 203b, are connected to a sealing ring 400 to ensure the sealing performance when the substructure 203a and the parent structure 203b are connected.
[0038] When wearing this device, first, the mask module 100 is tightly fitted to the user's head with a dedicated strap, forming a sealed space that fits snugly against the facial contours, preventing unpurified air from entering directly. The purification module 200 and monitoring module 300 are not integrated into the mask module 100, but are worn on the user's neck, arms, waist, or other body parts with separate straps, completely removing the weight of the mask and ensuring a stable and comfortable fit.
[0039] The purification module 200 adopts a standardized, detachable assembly method, allowing users to select and assemble according to their actual usage scenarios: For high ventilation requirements, multiple sets of first filter modules 201 with double-sided strip structures 203a and mother structure 203b are connected in parallel and stacked, with the exposed interface of the first filter module 201 with only strip structure 203a at the end sealed; for basic particle filtration requirements, single or multiple sets of first filter modules 201 can be assembled in parallel; for complex pollution such as toxic and harmful gases and odors, a second filter module 202 is connected in series at the rear end of the first filter module 201, and finally the monitoring module 300 is connected to the end second filter module 202 through the detachable structure 203. The module splicing is sealed by the sealing ring 400 to prevent air leakage. After the overall assembly is completed, the second outlet 303 of the monitoring module 300 is connected to the first inlet 102 of the mask module 100 through a sealed pipe to form a complete air delivery path.
[0040] After the device is started, the negative pressure fan 304 built into the monitoring module 300 generates negative pressure suction. The external air to be purified enters the purification module 200 under the action of negative pressure, and after completing multi-stage purification, it is delivered to the enclosed space of the mask for the user to breathe. The specific air purification process is as follows: 1. First-stage particle filtration: External air first enters the first chamber 201c through the outer shell of the first filter module 201. Since the first chamber 201c is isolated from the second flow channel 201e, the air cannot directly enter the flow channel and can only pass through the first partition 201b to enter the second chamber 201d. This process extends the contact area and time between the air and the first filter material (filter cotton), effectively filtering dust, particulate matter and other impurities in the air to complete the primary purification. Multiple sets of parallel first filter modules 201 are connected to intake air simultaneously. The more modules are stacked, the larger the intake area and the higher the air inflow, meeting the needs of high breathing load scenarios.
[0041] 2. Second-stage adsorption of harmful substances: The air that has passed through the primary filter converges into the second flow channel 201e, and then flows into the second filter module 202 through the third inlet 202b. After entering the inner cavity of the second outer shell 202a, the air is blocked by the dispersion plate 202d and evenly dispersed into the entire inner cavity along the radial guide channel 202e, making full contact with the second filter material (activated carbon) throughout the entire area. It efficiently adsorbs pollutants such as odors, toxic and harmful gases, and volatile organic compounds in the air, completing the second-stage deep purification. When multiple sets of second filter modules 202 are connected in series and stacked, the air passes through multiple sets of activated carbon filter materials step by step, and the purification level increases synchronously with the number of stacked modules, making it suitable for heavily polluted environments.
[0042] 3. Purified air delivery: The qualified air, after multi-stage purification, passes through the second filter module 202 and the monitoring module 300 in sequence and enters the first flow channel 301. Under the continuous power of the negative pressure fan 304, it enters the closed space formed by the hood 101 and the face, providing clean and breathable air for the user. At the same time, the negative pressure fan 304 actively delivers air, reducing the user's autonomous breathing resistance and achieving assisted breathing.
[0043] The monitoring module 300 has a built-in dedicated sensor that continuously monitors the air quality after purification by the purification module 200 during respirator operation, accurately monitoring the filtration effect and saturation state of the filter material. A preset air purification quality safety threshold is set. When the filter material reaches saturation and fails after prolonged use, resulting in air quality below the safety threshold, the sensor immediately triggers an early warning mechanism. This is achieved through indicator lights and a buzzer, providing a clear warning to the user that the filter module has failed and needs immediate replacement. Upon receiving the warning, the user can quickly remove and replace the saturated filter module using the detachable structure, without needing to replace the entire respirator, ensuring continuous breathing safety and preventing the inhalation of substandard air.
[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A dust and toxic substance safety early warning respiratory assistance system, characterized in that, include: A face mask module (100) includes a mask body (101) that fits the user's face and forms a closed space. The mask body (101) has a first inlet (102) and a first outlet (103). The purification module (200) includes a first filter module (201) and / or a second filter module (202). The first filter module (201) is filled with a first filter material, and the second filter module (202) is filled with a second filter material. The first filter module (201) and the second filter module (202) each have a detachable structure (203). A monitoring module (300) is provided, wherein the monitoring module (300) has a built-in first flow channel (301), one end of the first flow channel (301) forms a second inlet (302), and the other end of the first flow channel (301) forms a second outlet (303); the monitoring module (300) is detachably connected to the first filter module (201) or the second filter module (202); the second outlet (303) is connected to the first inlet (102) through a pipe; the monitoring module (300) is provided with a sensor for monitoring the working status of the first filter module (201) and the second filter module (202); Air passes through the purification module (200) and the monitoring module (300) in sequence before entering the enclosed space formed by the cover (101) and the user's face.
2. The dust and toxic gas safety early warning respiratory assistance system according to claim 1, characterized in that, The first filter module (201) includes a first outer shell (201a) and a first partition (201b). The first partition (201b) is connected to the inner cavity of the first outer shell (201a) and divides the inner cavity of the first outer shell (201a) into a first chamber (201c) and a second chamber (201d). The first chamber (201c) and the second chamber (201d) are respectively filled with a first filter material. The first filter module (201) is provided with a through second flow channel (201e). The second chamber (201d) is connected to the second flow channel (201e). One side of the first chamber (201c) and the first partition (201b) are provided with a perforated structure for air to pass through. Air enters the inner cavity of the first outer shell (201a) through the perforated structure and flows out through the second flow channel (201e).
3. The dust and toxic gas safety early warning respiratory assistance system according to claim 1, characterized in that, The second filter module (202) includes a second housing (202a), a third inlet (202b) is provided on one side of the second housing (202a), and a third outlet (202c) is provided on the other side of the second housing (202a); a dispersion plate (202d) is connected to the inner cavity of the second housing (202a) near the third inlet (202b) and a guide channel (202e) is provided; air enters its inner cavity after being dispersed through the guide channel (202e) from the third inlet (202b) and flows out to the third outlet (202c).
4. The dust and toxic substance safety early warning respiratory assistance system according to any one of claims 2-3, characterized in that, The detachable structure (203) is divided into a substructure (203a) and a parent structure (203b) that cooperate with each other. The first filter module (201) and the second filter module (202) have at least a substructure (203a), and the monitoring module (300) has a parent structure (203b).
5. The dust and toxic gas safety early warning respiratory assistance system according to claim 4, characterized in that, The first filter module (201), the second filter module (202), and the monitoring module (300) having the parent structure (203b) are connected with a sealing ring (400) to ensure the sealing performance when the substructure (203a) and the parent structure (203b) are connected.
6. The dust and toxic gas safety early warning respiratory assistance system according to claim 5, characterized in that, The purification module (200) includes at least two detachably connected first filter modules (201), one of which has a substructure (203a) and the other has both a substructure (203a) and a parent structure (203b); the second flow channels (201e) of the at least two first filter modules (201) are interconnected.
7. The dust and toxic gas safety early warning respiratory assistance system according to claim 5, characterized in that, The purification module (200) includes at least one first filter module (201) and at least one second filter module (202). The first filter module (201) has a substructure (203a), and the second filter module (202) has both a substructure (203a) and a parent structure (203b). The flow channel of the first filter module (201) is connected to the third inlet (202b) of the second filter module (202).
8. The dust and toxic gas safety early warning respiratory assistance system according to claim 1, characterized in that, The monitoring module (300) is connected to a negative pressure fan (304), which draws air filtered by the first filter module (201) and / or the second filter module (202) into the enclosed space formed between the cover (101) and the user's face.
9. The dust and toxic substance safety early warning respiratory assistance system according to claim 1, characterized in that, A first one-way valve plate (104) and a second one-way valve plate (105) are connected at the first outlet (103) with parallel spacing; in the first direction, the bottom end of the first one-way valve plate (104) is fixedly connected to the cover (101), and the top end of the second one-way valve plate (105) is fixedly connected to the cover (101).
10. The dust and toxic gas safety early warning respiratory assistance system according to any one of claims 1-5, characterized in that, The first filter material is filter cotton, and the second filter material is activated carbon.