A device and method for testing the protection time of an organic vapor from a face mask.

Abstract

This invention discloses a device and method for testing the organic vapor protection time of face masks, relating to the field of face mask protection time testing. It includes an organic vapor generator, a gas monitoring sealed container and a sample testing sealed container connected to the organic vapor generator via a pipe at the inlet end, a biomimetic suction testing mechanism disposed on the outer wall of the sample testing sealed container and connected to it, and a gas measuring device connected to the exhaust end of the biomimetic suction testing mechanism, the gas monitoring sealed container, and the sample testing sealed container via a pipe at the input end. The face mask organic vapor protection time testing solution provided by this invention achieves efficient and accurate protective performance evaluation through systematic integration and intelligent control.

Description

Technical Field

[0001] This invention relates to the technical field of mask protection time testing, specifically to a mask organic vapor protection time testing device and its testing method. Background Technology

[0002] Face masks, as essential personal protective equipment, are widely used in industrial production, healthcare, and environmental protection. Their protective performance directly affects the safety of users. One of the key performance indicators of a protective mask is its ability to block organic vapors, typically measured by the time it takes for the vapor penetration rate to reach a set threshold under specified test conditions—this is known as protection time. Accurately assessing this time is crucial for scientifically evaluating the protective effectiveness of masks, developing relevant standards, and guiding users in their selection.

[0003] Currently, the industry has some basic methods and devices for testing the protection time of masks against organic vapors. Common technical solutions typically include organic vapor generation, sample exposure, and concentration monitoring. This involves continuously supplying a certain concentration of organic vapor to the test sample and detecting changes in downstream gas concentration to determine the penetration time. However, existing testing devices and methods often focus on simulating a single, constant airflow, making it difficult to realistically simulate the dynamic breathing process of the human body when actually wearing a mask. This leads to differences between test conditions and real-world usage scenarios, and the obtained protection time may not accurately reflect the mask's performance under actual wearing conditions. Furthermore, existing technologies often lack sufficient stability in controlling organic vapor concentration, precise adjustment of temperature and humidity, and automation of the testing process, making them susceptible to human error and affecting the consistency and reliability of test results.

[0004] Therefore, how to construct a testing device and method for testing the organic vapor protection time of masks that can highly simulate real breathing conditions and accurately control the testing environment has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a device and method for testing the organic vapor protection time of a mask, so as to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a mask organic vapor protection time testing device, comprising an organic vapor generator, an inlet end connected via a pipe to a gas monitoring sealed container and a sample testing sealed container, a biomimetic suction testing mechanism disposed on the outer wall of the sample testing sealed container and connected to the sample testing sealed container, and a gas measuring device whose input end is connected via a pipe to the exhaust end of the biomimetic suction testing mechanism, the gas monitoring sealed container, and the sample testing sealed container, wherein the biomimetic suction testing mechanism includes a housing, and an inlet end is disposed on the outer wall of the housing and connected via a pipe to the exhaust end of the biomimetic suction testing mechanism, the gas monitoring sealed container, and the sample testing sealed container. The sample testing sealed container is connected to a sample clamping device, and a biomimetic suction device is disposed inside the container. The biomimetic suction device includes a support frame disposed inside the container, a mask box disposed at the exhaust end of the sample clamping device, and a reciprocating suction component disposed on the support frame. The input end of the reciprocating suction component is connected to the mask box, and the output end of the reciprocating suction component is connected to the discharge pipe. It also includes two first flap-type opening and closing components disposed at the nose and mouth of the mask box, a partition disposed at the input end of the discharge pipe, and a plurality of second flap-type opening and closing components disposed on the outer wall of the partition.

[0007] Preferably, the organic vapor generator includes a first flow regulator, a water tank, and a gas mixing tank arranged sequentially and interconnected. The output of the first flow regulator is connected to the gas mixing tank via a pipeline. It also includes a second flow regulator, a water bath thermostat, and a three-necked flask placed inside the water bath thermostat. The output of the second flow regulator is connected to the three-necked flask via a pipeline, and the three-necked flask is connected to the gas mixing tank via a pipeline. Furthermore, it includes a temperature and humidity recorder whose input is connected to the gas mixing tank via a pipeline. The inputs of both the first and second flow regulators are connected to a gas source pipe, and the discharge end of the gas mixing tank is connected to a gas monitoring sealed container and a sample testing sealed container via pipelines. In this preferred embodiment, the organic vapor generator achieves a stable supply of organic vapor.

[0008] Preferably, the sample clamping device includes a sample box mounted on the housing, an air inlet pipe connected at one end to the sample box and at the other end to the sample testing sealed container, an exhaust pipe connected at one end to the side of the sample box away from the air inlet pipe, and a sample clamping component disposed within the sample box; the mask box is located inside the exhaust pipe and its outer wall is connected to the inner wall of the exhaust pipe via a sealing plate. In this preferred embodiment, the sample clamping device facilitates rapid sample mounting.

[0009] Preferably, the sample clamping component includes two symmetrically arranged clamping plates that can interlock with each other, and a detection hole passing through the clamping plates. In this preferred embodiment, the sample clamping component achieves stable clamping and fixation of the sample.

[0010] Preferably, the reciprocating suction component includes a diversion box mounted on the support frame and connected to the mask box via a pipe, an extension pipe connected at one end to the diversion box, and a plunger disposed within the extension pipe; it also includes a drive motor mounted on the support frame, a drive disc disposed at the actuating end of the drive motor, and a transmission rod hinged at one end to the outer wall of the drive disc and at the other end to the plunger; the discharge pipe inlet is connected to the diversion box. In this preferred embodiment, negative pressure suction is achieved through the reciprocating suction component.

[0011] Preferably, the first flap-type opening and closing component is located inside the mask box, and the second flap-type opening and closing component is located on the side of the partition near the discharge pipe. The second flap-type opening and closing component has the same structure as the first flap-type opening and closing component. The first flap-type opening and closing component includes two air holes passing through the mask box, a rubber ring disposed on the inner wall of the mask box and fitted around the outer edge of the air holes, two rotating flaps hinged to the inner wall of the mask box at one end and symmetrically arranged, two extended scrapers symmetrically arranged on both sides of the rotating flaps, and an elastic pull cord connected at one end to the extended scrapers and at the other end to the inner wall of the mask box. In this preferred embodiment, the airflow delivery direction is defined by the first flap-type opening and closing component and the second flap-type opening and closing component.

[0012] Preferably, the device further includes an electromagnetic locking assembly, which includes an iron block protrusion disposed on the outer wall of the rotating flap, a fixed box disposed on the outer wall of the mask box and communicating with the mask box, and an electromagnetic block disposed within the fixed box. In this preferred embodiment, the electromagnetic locking assembly achieves the limiting and locking of the first flap-type opening and closing component or the second flap-type opening and closing component.

[0013] Preferably, the device further includes a monitoring component mounted on the support frame for monitoring the operating frequency of the reciprocating suction component. The monitoring component includes an encoder mounted on the support frame and a driven wheel located at the input end of the encoder; the outer wall of the driven wheel abuts against the drive disc. In this preferred embodiment, the monitoring component facilitates the monitoring of the operating frequency of the reciprocating suction component.

[0014] Preferably, the device further includes a controller that connects the organic vapor generator, the gas measuring device, and the biomimetic suction device via electrical signals; the controller includes an organic vapor control module, a gas monitoring module, a pipeline switching module, an alarm module, and a biomimetic suction module. In this preferred embodiment, the controller enables system control of the testing device.

[0015] Based on the above technical solution of a mask organic vapor protection time testing device, a mask organic vapor protection time testing method will also be provided, including the following steps: Step 1, Sample installation and test preparation: After the sample to be tested is clamped and fixed by the sample clamping component, it is inserted into the sample box to complete the sample fixation. The controller opens the valve on the pipeline between the gas mixing tank and the gas monitoring sealed tank; Step 2, Airflow and temperature and humidity control: The controller opens the first flow regulator. The airflow enters the gas mixing tank after passing through the water tank or directly enters the gas mixing tank through the discharge end of the first flow regulator. The controller receives the data measured by the temperature and humidity recorder and adjusts the output flow of the first flow regulator until the gas flow data and humidity data are within the specified range and remain stable; Step 3, Organic vapor generation and concentration stabilization: The controller opens the second flow regulator, the water bath thermostat, and the gas mixing tank. The mixed organic vapor enters the gas monitoring sealed tank through the pipeline. The controller receives the gas concentration data in the gas monitoring sealed tank measured by the gas measuring device until the change in gas concentration data is less than the set value, and records the gas concentration data. The time required for the change in concentration data to fall below the set value is defined as time one. Step four: Initial weighing and device reset. The controller shuts off the organic vapor generator, removes the three-necked flask containing cyclohexane, wipes off surface moisture, weighs it, and records the weight. Then, the three-necked flask is reconnected to obtain the consumption of cyclohexane within time one. Step five: Formal testing and penetration detection. The controller restarts the organic vapor generator and starts timing. After time one, the inlet valve of the sample test sealing tank is opened and the inlet valve of the gas monitoring sealing tank is closed. At the same time, the controller triggers the biomimetic suction device to perform human biomimetic suction. The controller receives the exhaust quality information of the exhaust pipe measured by the gas measuring device. When the exhaust quality information is unqualified, the controller triggers the alarm device to sound an alarm, records the total duration, shuts off the organic vapor generator, removes the three-necked flask, wipes off surface moisture, weighs it, and records the weight. Step six: Protection time calculation. Based on the consumption of organic vapor at the corresponding concentration within time one, the gas flow rate, the total consumption, and the total duration, the protection time of the sample under test at the set concentration is calculated.

[0016] In summary, the present invention has the following main beneficial effects:

[0017] The organic vapor protection time test scheme for masks provided by this invention achieves efficient and accurate protection performance evaluation through systematic integration and intelligent control.

[0018] This solution constructs a complete testing system, with an organic vapor generator, a sealed test container, a biomimetic suction mechanism, and measuring devices working collaboratively through a controller. The testing process is scientifically rigorous, including a pre-stabilization phase before formal testing to ensure the organic vapor concentration reaches the set standard, providing an accurate benchmark for subsequent tests. Throughout the process, temperature and humidity control, concentration monitoring, valve switching, and endpoint alarms are all automatically executed by the controller, minimizing human error and ensuring the standardization and repeatability of the tests.

[0019] This solution provides highly realistic testing conditions. The biomimetic suction device simulates the reciprocating airflow of human breathing and automatically switches between "nasal breathing only" and "mouth and nose breathing" modes by intelligently recognizing breathing frequency, thus more realistically reflecting the protective effect of the mask under different usage intensities. In terms of data processing, the solution performs scientific calculations based on multiple parameters such as consumption, flow rate, concentration, and time, and calibrates to derive the protection time at a specified concentration, ensuring the accuracy and practicality of the results. Attached Figure Description

[0020] Figure 1 This is a structural framework diagram of the device of the present invention;

[0021] Figure 2 This is a schematic diagram of the controller control structure of the present invention;

[0022] Figure 3 This is a structural framework diagram of the controller system of the present invention;

[0023] Figure 4 This is an isometric view of the sample test sealed container structure of the present invention;

[0024] Figure 5 This is an isometric view of the sample clamping device and the biomimetic suction device of the present invention.

[0025] Figure 6 This is an exploded view of the sample clamping device and the biomimetic suction device of the present invention.

[0026] Figure 7 This is an exploded view of the sample clamping device structure of the present invention;

[0027] Figure 8 This is an exploded view of the biomimetic suction device of the present invention.

[0028] Figure 9 For the present invention Figure 8 Enlarged view of the structure at point A in the middle;

[0029] Figure 10 This is a top view of the sample clamping device structure of the present invention;

[0030] Figure 11This is a cross-sectional view of the sample clamping device and the biomimetic suction device of the present invention.

[0031] Figure Descriptions: 10. Organic vapor generator; 11. First flow regulator; 12. Water tank; 13. Gas mixing tank; 14. Second flow regulator; 15. Water bath thermostat; 16. Three-necked flask; 17. Temperature and humidity recorder; 20. Gas monitoring sealed container; 30. Sample testing sealed container; 40. Controller; 41. Organic vapor control module; 42. Gas monitoring module; 43. Pipeline switching module; 44. Alarm module; 45. Bionic suction module; 50. Gas measuring device; 60. Box; 70. Sample clamping device; 71. Sample box; 72. Inlet pipe; 73. Exhaust pipe; 74. Sample clamping component; 741. Clamping plate; 742. Detection port; 80. Bionic suction device; 81. Support frame; 82. Mask box; 83. Reciprocating suction component; 831. Diverter box; 832. Extension tube; 833. Plunger; 834. Drive motor; 835. Drive disc; 836. Transmission rod; 84. Discharge tube; 85. First flap-type opening and closing component; 851. Air hole; 852. Rubber ring; 853. Rotating flap; 854. Extension scraper; 855. Elastic pull rope; 856. Electromagnetic locking component; 8561. Iron block protrusion; 8562. Fixing box; 8563. Electromagnetic block; 86. Partition; 87. Second flap-type opening and closing component; 88. Monitoring component; 881. Encoder; 882. Driven wheel. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0033] The embodiments of the present invention will now be described.

[0034] Please refer to the appendix for details. Figure 1-5As shown, in a preferred embodiment of the present invention, a mask organic vapor protection time testing device includes an organic vapor generator 10, a gas monitoring sealed container 20 and a sample testing sealed container 30 connected to the organic vapor generator 10 via a pipe at the inlet end, a biomimetic suction testing mechanism disposed on the outer wall of the sample testing sealed container 30 and connected to the sample testing sealed container 30, and a gas measuring device 50 whose input end is connected to the exhaust end of the biomimetic suction testing mechanism, the gas monitoring sealed container 20 and the sample testing sealed container 30 via a pipe. The biomimetic suction testing mechanism includes a housing 60, a sample clamping device 70 passing through the outer wall of the housing 60 and whose input end is connected to the sample testing sealed container 30, and a biomimetic suction device 80 disposed inside the housing 60. The organic vapor generator 10 includes a first flow regulator 11, a water tank 12 and a gas mixing tank 13 arranged sequentially and connected to each other. The first flow regulator 11 outputs... The outlet is connected to a gas mixing tank 13 via a pipe; it also includes a second flow regulator 14 and a water bath thermostat 15, and a three-necked flask 16 placed inside the water bath thermostat 15. The output end of the second flow regulator 14 is connected to the three-necked flask 16 via a pipe, and the three-necked flask 16 is connected to the gas mixing tank 13 via a pipe; it also includes a temperature and humidity recorder 17 whose input end is connected to the gas mixing tank 13 via a pipe; the input ends of the first flow regulator 11 and the second flow regulator 14 are both connected to a gas source pipe, and the outlet end of the gas mixing tank 13 is connected to the gas monitoring sealed tank 20 and the sample testing sealed tank 30 via a pipe; it also includes a controller 40 that is electrically connected to the organic vapor generator 10, the gas measuring device 50, and the biomimetic suction device 80; the controller 40 includes an organic vapor control module 41, a gas monitoring module 42, a pipe switching module 43, an alarm module 44, and a biomimetic suction module 45.

[0035] It should be noted that, in this embodiment, during the test, after the sample clamping component 74 clamps and fixes the sample to be tested, it is inserted into the sample box 71 to complete the sample fixation, and the pipeline switching module 43 opens the valve on the pipeline between the gas mixing tank 13 and the gas monitoring sealing tank 20.

[0036] The organic vapor control module 41 turns on the first flow regulator 11. The gas flow enters the gas mixing tank 13 after passing through the water tank 12, or directly enters the gas mixing tank 13 through the discharge end of the first flow regulator 11. The gas monitoring module 42 receives the data measured by the temperature and humidity recorder 17 and adjusts the output flow of the first flow regulator 11 until the gas flow data and humidity data are within the specified range and remain stable.

[0037] The organic vapor control module 41 activates the second flow regulator 14, the water bath thermostat 15, and the gas mixing tank 13. The mixed organic vapor enters the gas monitoring sealed tank 20 through the pipeline. The gas monitoring module 42 receives the gas concentration data in the gas monitoring sealed tank 20 measured by the gas measuring device 50 until the change in gas concentration data is less than the set value, and records the time required for the change in gas concentration data to reach less than the set value as time one.

[0038] The organic vapor control module 41 shuts down the organic vapor generator 10, removes the three-necked flask 16 containing cyclohexane, wipes off the surface moisture, weighs it, records the weight, and then reconnects the three-necked flask 16 to obtain the amount of cyclohexane consumed within a time period.

[0039] The organic vapor control module 41 restarts the organic vapor generator 10 and starts timing. After time one, the pipeline switching module 43 opens the inlet valve of the sample test sealed container 30 and closes the inlet valve of the gas monitoring sealed container 20. At the same time, the bionic suction module 45 triggers the bionic suction device 80 to perform human bionic suction. The gas monitoring module 42 receives the exhaust quality information of the exhaust pipe 84 measured by the gas measuring device 50. The alarm module 44 triggers the alarm device when the exhaust quality information is unqualified. The total duration is recorded. The organic vapor generator 10 is turned off. The three-necked flask 16 is taken out, the surface moisture is wiped off, and it is weighed and the weight is recorded.

[0040] The protection time of the sample under test at the set concentration of organic vapor is calculated based on the consumption, gas flow rate, total consumption and total duration of the corresponding concentration of organic vapor within one time period.

[0041] Furthermore, the determination of the organic vapor protection time for the sample is calculated based on the data recorded in the above procedure. The initial weight of cyclohexane is m0, the final weight is m1, the specified test concentration is C0, the total consumption is (m0-m1), the cyclohexane consumption in 15 minutes is M, the gas flow rate is Q, the test start recording time is T0, the test end recording time is T1, and the total test duration is (T1-T0). The units for weight are g, time is min, and gas flow rate is L / min. The organic vapor protection time for the sample is calculated as follows:

[0042] Average test concentration C1:

[0043]

[0044] The specified protection time t for organic vapors at the test concentration:

[0045] ;

[0046] Further, during the test, the gas flow rate was adjusted to 30 L / min, the humidity was adjusted to 70±5% RH by adjusting the dry-to-wet ratio, and the temperature was adjusted to 25±3℃. 55±1 mL of cyclohexane was placed in a 100 mL three-necked flask 16, the apparatus was connected, and the water bath temperature was adjusted to 12℃. Then, the valves were opened sequentially. The flow rate reading of the second flow regulator 14 was approximately 0.155 L / min. The specified test concentration was 80 ppm. After 15 minutes, the gas concentration stabilized, and the cyclohexane concentration in the gas monitoring sealed container 20 was 85 ppm, ensuring the test concentration was within ±10% of the specified test concentration. The organic vapor generator 10 was turned off, and the weight of the cyclohexane was measured. The apparatus was then reconnected and the organic vapor generator 10 was turned on again. After 15 minutes, the apparatus was turned off, and the weight of the cyclohexane was measured again. This process was repeated three times, and the average consumption over 15 minutes was found to be 0.22 g. The device was then connected, the sample testing sealed container 30 was closed, the gas monitoring sealed container 20 was opened, and the cyclohexane supply was started. After 15 minutes, the sealed containers were switched, the sample testing sealed container 30 was opened, and the gas monitoring sealed container 20 was closed. The penetration concentration was set to 10 ppm. The alarm was waited for, the cyclohexane supply was stopped, and the sample was weighed and the endpoint time was recorded. The total cyclohexane consumption was calculated to be 0.3 g, and the total test duration was 24 minutes. The final organic vapor protection time of the mask sample was determined to be 9.5 minutes.

[0047] Furthermore, when the organic vapor generator 10 is working, the gas supply pipes at the input ends of the first flow regulator 11 and the second flow regulator 14 supply pressurized gas. After the first flow regulator 11 limits the flow, the gas flow is moistened by the water tank 12 and then enters the gas mixing tank 13, or after the first flow regulator 11 limits the flow, the gas flow directly enters the gas mixing tank 13.

[0048] After the second flow regulator 14 limits the flow, the airflow passes through the three-necked flask 16 and carries the vaporized organic vapor into the gas mixing tank 13. The stirring rod inside the gas mixing tank 13 can mix the airflow.

[0049] Please refer to the appendix for details. Figure 5 , 6 As shown in Figures 7 and 10, in another preferred embodiment of the present invention, the sample clamping device 70 includes a sample box 71 disposed on the housing 60, an air inlet pipe 72 connected at one end to the sample box 71 and at the other end to the sample test sealed container 30, an exhaust pipe 73 connected at one end to the side of the sample box 71 away from the air inlet pipe 72, and a sample clamping component 74 disposed in the sample box 71; the mask box 82 is located inside the exhaust pipe 73 and its outer wall is connected to the inner wall of the exhaust pipe 73 through a sealing plate; the sample clamping component 74 includes two clamping plates 741 symmetrically arranged and capable of interlocking with each other, and a detection hole 742 passing through the clamping plates 741.

[0050] It should be noted that, in this embodiment, when the sample clamping device 70 is working, the sample mask is placed between the two clamping plates 741 and the detection hole 742 is covered. After the two clamping plates 741 are combined, the two clamping plates 741 are interlocked with each other. The two interlocked clamping plates 741 are then inserted into the sample box 71 to complete the sample loading.

[0051] Please refer to the appendix for details. Figure 6 , 8As shown in Figures 9 and 11, in another preferred embodiment of the present invention, the biomimetic suction device 80 includes a support frame 81 disposed within the housing 60, a mask box 82 disposed at the exhaust end of the sample clamping device 70, and a reciprocating suction component 83 disposed on the support frame 81. The input end of the reciprocating suction component 83 is connected to the mask box 82, and the output end of the reciprocating suction component 83 is connected to the discharge pipe 84. It also includes two first flap-type opening and closing components 85 respectively disposed at the nose and mouth of the mask box 82, a partition 86 disposed at the input end of the discharge pipe 84, and a plurality of second flap-type opening and closing components 87 disposed on the outer wall of the partition 86. The reciprocating suction component 83 includes a diversion box 831 mounted on the support frame 81 and connected to the mask box 82 via a pipe, an extension pipe 832 connected at one end to the diversion box 831, and a plunger 833 disposed within the extension pipe 832; it also includes a drive motor 834 mounted on the support frame 81, a drive disc 835 disposed at the actuating end of the drive motor 834, and a transmission rod 836 hinged at one end to the outer wall of the drive disc 835 and at the other end to the plunger 833; the inlet end of the discharge pipe 84 is connected to the diversion box 831, and the first flap-type opening and closing component 85 is located inside the mask box 82. The second flap-type opening and closing component 87 is located on the side of the partition 86 near the discharge pipe 84. The second flap-type opening and closing component 87 has the same structure as the first flap-type opening and closing component 85. The first flap-type opening and closing component 85 includes two air holes 851 passing through the mask box 82, a rubber ring 852 provided on the inner wall of the mask box 82 and sleeved on the outer edge of the air holes 851, two rotating flaps 853 hinged to the inner wall of the mask box 82 at one end and symmetrically arranged, two extended scrapers 854 symmetrically arranged on both sides of the rotating flaps 853, and an elastic band connected at one end to the extended scrapers 854 and at the other end to the inner wall of the mask box 82. The pull cord 855 also includes an electromagnetic locking assembly 856, which includes an iron block protrusion 8561 on the outer wall of the rotating flap 853, a fixed box 8562 on the outer wall of the mask box 82 and communicating with the mask box 82, and an electromagnetic block 8563 inside the fixed box 8562. It also includes a monitoring component 88 on the support frame 81 for monitoring the operating frequency of the reciprocating suction component 83. The monitoring component 88 includes an encoder 881 on the support frame 81 and a driven wheel 882 at the input end of the encoder 881. The outer wall of the driven wheel 882 abuts against the drive disk 835.

[0052] It should be noted that, in this embodiment, when the bionic suction device 80 is working, the bionic suction module 45 obtains the reciprocating frequency of the reciprocating suction component 83 through the monitoring component 88. The reciprocating frequency of the reciprocating suction component 83 is the intensity of imitating human breathing. When the reciprocating frequency is lower than the set value, the first flap-type opening and closing component 85 of the nose of the mask box 82 opens, that is, imitating human nasal breathing. When the reciprocating frequency is greater than the set value, the first flap-type opening and closing components 85 of the nose and mouth of the mask box 82 open simultaneously, that is, imitating human mouth and nose breathing simultaneously. In this way, the effective time of the sample under different breathing states can be measured.

[0053] Furthermore, when the reciprocating suction component 83 is working, the actuator of the drive motor 834 drives the drive disk 835 to rotate, and the drive disk 835 drives the plunger 833 to reciprocate within the extension tube 832 through the transmission rod 836.

[0054] Furthermore, when the first flap-type opening and closing component 85 and the second flap-type opening and closing component 87 are working, when the plunger 833 moves away from the diversion box 831, the diversion box 831 is under negative pressure, and the rotating flap 853 in the first flap-type opening and closing component 85 reverses, allowing air to enter the diversion box 831.

[0055] When the plunger 833 moves toward the diversion box 831, the diversion box 831 is under positive pressure, and the rotating flap 853 in the second flap-type opening and closing component 87 reverses, and air is discharged into the discharge pipe 84.

[0056] The working principle of the second flap-type opening and closing component 87 is the same as that of the first flap-type opening and closing component 85. Taking the operation of the first flap-type opening and closing component 85 as an example, the air hole 851 allows airflow to pass through, the rubber ring 852 increases the sealing performance, and the rotating flap 853 can overcome the tension of the elastic pull rope 855 under the action of air pressure. When there is no air pressure, the elastic pull rope 855 can assist in extending the scraper 854 and resetting the rotating flap 853.

[0057] Furthermore, after the electromagnetic block 8563 is energized, the magnetic iron block protrudes 8561 to limit and lock the rotating flap 853.

[0058] Furthermore, when the monitoring component 88 is working, the driven wheel 882 rotates along with the drive disk 835, and the driven wheel 882 drives the input end of the encoder 881 to rotate. The encoder 881 transmits the rotation information to the controller 40.

[0059] Based on the above embodiments, a method for testing the organic vapor protection time of a face mask will also be provided, including the following steps.

[0060] Step 1: Sample installation and test preparation. After the sample clamping component 74 clamps and fixes the sample to be tested, it is inserted into the sample box 71 to complete the sample fixation. The controller 40 opens the valve on the pipeline between the gas mixing tank 13 and the gas monitoring sealing tank 20.

[0061] Step 2: Airflow and temperature and humidity control. The controller 40 turns on the first flow regulator 11. The airflow enters the gas mixing tank 13 after passing through the water tank 12, or directly enters the gas mixing tank 13 through the discharge end of the first flow regulator 11. The controller 40 receives the data measured by the temperature and humidity recorder 17 and adjusts the output flow of the first flow regulator 11 until the air flow data and humidity data are within the specified range and remain stable.

[0062] Step 3: Organic vapor generation and concentration stabilization. Controller 40 activates the second flow regulator 14, water bath thermostat 15, and gas mixing tank 13. The mixed organic vapor enters the gas monitoring sealed tank 20 through the pipeline. Controller 40 receives the gas concentration data in the gas monitoring sealed tank 20 measured by the gas measuring device 50 until the change in gas concentration data is less than the set value. The time required for the change in gas concentration data to reach less than the set value is recorded as time one.

[0063] Step 4: Initial weighing and device reset. Controller 40 shuts off the organic vapor generator 10, removes the three-necked flask 16 containing cyclohexane, wipes off the surface moisture, weighs it, records the weight, and then reconnects the three-necked flask 16 to obtain the amount of cyclohexane consumed within one time period.

[0064] Step 5: Formal Testing and Penetration Detection. Controller 40 restarts the organic vapor generator 10 and starts timing. After time 1, it opens the inlet valve of the sample test sealed container 30 and closes the inlet valve of the gas monitoring sealed container 20. At the same time, controller 40 triggers the bionic suction device 80 to perform human bionic suction. Controller 40 receives the exhaust quality information of the exhaust pipe 84 measured by the gas measuring device 50. When the exhaust quality information is unqualified, controller 40 triggers the alarm device to sound an alarm, records the total time, shuts off the organic vapor generator 10, removes the three-necked flask 16, wipes off the surface moisture, weighs it, and records the weight.

[0065] Step 6: Calculate the protection time. Based on the consumption of organic vapor at the corresponding concentration within time 1, the gas flow rate, the total consumption, and the total duration, calculate the protection time of the sample under test at the set concentration of organic vapor.

[0066] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A device for testing the organic vapor protection time of a mask, comprising an organic vapor generating device (10), a gas monitoring sealed tank (20) and a sample testing sealed tank (30) connected to the organic vapor generating device (10) through a pipeline at an air inlet end, a bionic suction testing mechanism arranged on the outer wall of the sample testing sealed tank (30) and connected to the sample testing sealed tank (30), and a gas measuring device (50) connected to the bionic suction testing mechanism at an air outlet end, the gas monitoring sealed tank (20) and the sample testing sealed tank (30) at an air inlet end, characterized in that, The bionic suction test mechanism comprises a box (60), a sample clamping device (70) penetrating the outer wall of the box (60) and communicating with a sample test sealed tank (30) at an input end, and a bionic suction device (80) arranged in the box (60); The bionic suction device (80) comprises a support frame (81) arranged in the box (60), a mask box (82) arranged at an exhaust end of the sample clamping device (70), and a reciprocating suction component (83) arranged on the support frame (81), wherein the reciprocating suction component (83) communicates with the mask box (82) at an input end, and the reciprocating suction component (83) communicates with an exhaust pipe (84) at an output end; Further comprising two first flap opening and closing components (85) arranged at a nose portion and a mouth portion of the mask box (82) respectively, a baffle (86) arranged at an input end of the exhaust pipe (84), and a plurality of second flap opening and closing components (87) arranged on the outer wall of the baffle (86), the organic vapor generating device (10) comprises a first flow regulator (11), a water tank (12) and a gas mixing tank (13) arranged in sequence and communicating with each other, wherein the first flow regulator (11) communicates with the gas mixing tank (13) at an output end through a pipeline; further comprising a second flow regulator (14) and a water bath thermostat (15), and a three-necked flask (16) arranged in the water bath thermostat (15), wherein the second flow regulator (14) communicates with the three-necked flask (16) at an output end through a pipeline, and the three-necked flask (16) communicates with the gas mixing tank (13) through a pipeline; further comprising a temperature and humidity recorder (17) communicating with the gas mixing tank (13) at an input end through a pipeline; the input ends of the first flow regulator (11) and the second flow regulator (14) both communicate with a gas source pipe, and the exhaust end of the gas mixing tank (13) communicates with the gas monitoring sealed tank (20) and the sample test sealed tank (30) through a pipeline, the sample clamping device (70) comprises a sample loading box (71) arranged on the box (60), an air inlet pipe (72) communicating with the sample loading box (71) at one end and communicating with the sample test sealed tank (30) at the other end, an exhaust pipe (73) communicating with the sample loading box (71) at one end and away from the air inlet pipe (72) on one side, and a sample clamping component (74) arranged in the sample loading box (71); the mask box (82) is located in the exhaust pipe (73) and the outer wall thereof is connected to the inner wall of the exhaust pipe (73) through a sealing plate, further comprising a controller (40) electrically connected with the organic vapor generating device (10), the gas measuring device (50) and the bionic suction device (80); the controller (40) comprises an organic vapor control module (41), a gas monitoring module (42), a pipeline switching module (43), an alarm module (44) and a bionic suction module (45).

2. A device for testing the organic vapor protection time of a face mask according to claim 1, characterized in that The sample clamping component (74) comprises two clamping plate (741) symmetrically arranged and capable of being clamped to each other, and a detection hole (742) penetrating the clamping plate (741).

3. A device for testing the organic vapor protection time of a mask according to claim 1, characterized in that The reciprocating suction component (83) comprises a shunt box (831) arranged on the support frame (81) and communicated with the mask box (82) through a pipeline, an extension pipe (832) communicated with one end of the shunt box (831), and a plunger (833) arranged in the extension pipe (832); Further comprising a driving motor (834) arranged on the support frame (81), a driving disc (835) arranged at an execution end of the driving motor (834), and a transmission rod (836) hingedly connected to an outer wall of the driving disc (835) at one end and hingedly connected to the plunger (833) at the other end; The input end of the exhaust pipe (84) is communicated with the shunt box (831).

4. A device for testing the organic vapor protection time of a mask according to claim 1, characterized in that The first flap opening and closing component (85) is located inside the mask box (82), the second flap opening and closing component (87) is located on one side of the partition plate (86) close to the exhaust pipe (84), and the second flap opening and closing component (87) is the same in structure as the first flap opening and closing component (85); The first flap opening and closing component (85) comprises two air holes (851) penetrating the mask box (82), a rubber ring (852) arranged on the inner wall of the mask box (82) and sleeved on the outer edge of the air hole (851), two rotating flaps (853) hingedly connected to the inner wall of the mask box (82) and symmetrically arranged, two extension ear scrapers (854) symmetrically arranged on both sides of the rotating flap (853), and a elastic pull rope (855) connected to one end of the extension ear scraper (854) and the other end of the inner wall of the mask box (82).

5. A device for testing the organic vapor protection time of a mask according to claim 4, characterized in that Further comprising an electromagnetic locking assembly (856), the electromagnetic locking assembly (856) comprises a iron block protrusion (8561) arranged on the outer wall of the rotating flap (853), a fixed box (8562) arranged on the outer wall of the mask box (82) and communicated with the mask box (82), and an electromagnetic block (8563) arranged in the fixed box (8562).

6. A device for testing the organic vapor protection time of a mask according to claim 3, characterized in that Further comprising a monitoring component (88) arranged on the support frame (81) and used for monitoring the running frequency of the reciprocating suction component (83), the monitoring component (88) comprises an encoder (881) arranged on the support frame (81), and a driven wheel (882) arranged at the input end of the encoder (881); The outer wall of the driven wheel (882) abuts against the driving disc (835).

7. A method of testing the organic vapor protection time of a mask using the device of any one of claims 1-6. The method comprises the following steps, Step one, sample installation and test preparation, after the sample clamping component (74) clamps and fixes the sample to be tested, the sample clamping component (74) is inserted into the sample installation box (71) to complete the sample fixation, and the controller (40) opens the valve on the pipeline between the gas mixing tank (13) and the gas monitoring sealed tank (20); Step two, air flow and temperature and humidity control, the controller (40) opens the first flow regulator (11), the air flow enters the gas mixing tank (13) after the water tank (12) or directly enters the gas mixing tank (13) through the first flow regulator (11) discharge end, the controller (40) receives the data measured by the temperature and humidity recorder (17) and adjusts the output flow of the first flow regulator (11), until the air flow data and humidity data are in the specified range and remain stable; Step three, organic vapor generation and concentration stability, the controller (40) opens the second flow regulator (14), the water bath thermostat (15) and the gas mixing tank (13), the mixed organic vapor enters the gas monitoring sealed tank (20) through the pipeline, the controller (40) receives the gas concentration data measured by the gas measuring device (50) in the gas monitoring sealed tank (20), until the gas concentration data change is less than the set value, and records the time required for the gas concentration data change to be less than the set value as time one; Step four, initial weighing and device reset, the controller (40) closes the organic vapor generation device (10), takes out the three neck flask (16) containing cyclohexane, wipes off the surface moisture and weighs, records the weight, and then resets the connection three neck flask (16) to obtain the consumption of cyclohexane in time one; Step five, formal test and penetration detection, the controller (40) opens the organic vapor generation device (10) again, and starts timing, opens the sample test sealed tank (30) inlet valve and closes the gas monitoring sealed tank (20) inlet valve after reaching time one, while the controller (40) triggers the bionic suction device (80) to perform human bionic suction, the controller (40) receives the exhaust quality information of the exhaust pipe (84) measured by the gas measuring device (50), the controller (40) triggers the alarm device to alarm when the exhaust quality information is unqualified, records the total time, closes the organic vapor generation device (10), takes out the three neck flask (16), wipes off the surface moisture and weighs, records the weight; Step six, protection time calculation, according to the consumption of the corresponding concentration organic vapor in time one, air flow, total consumption and total time, the organic vapor protection time of the sample to be tested under the set concentration is calculated.

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