A kind of nanometer silica polycarbonate film moisture permeability detection device

Abstract

The application discloses a kind of nano-silica polycarbonate film moisture permeability detection device, it is related to polycarbonate film detection technical field, including water storage tank and adjusting assembly, the top of water storage tank is connected with load disc by one-way valve, and the inside of load disc is placed with lower partition, the top of lower partition is provided with top cover, and the inside of top cover is placed with upper partition, the periphery of load disc is connected with connecting assembly.The application forms multiple independent test chambers by lower partition and upper partition, which makes it possible to place the same sample in multiple different humidity environments simultaneously and efficiently for comparison testing when detecting the moisture permeability of nano-silica polycarbonate film. The humidity environment is accurately generated by the humidifying unit and drying unit, and the mixture ratio of dry and wet gas input into each chamber is flexibly adjusted by the bus adjusting valve, thereby achieving wide-range humidity control.

Description

Technical Field

[0001] This invention relates to the field of polycarbonate film testing technology, specifically to a device for testing the moisture permeability of nano-silica polycarbonate films. Background Technology

[0002] Nano-silica polycarbonate film is a multi-microporous composite film prepared by blending and filling or coating nano-silica particles with polycarbonate as the matrix. It has high transparency, high hardness, scratch resistance and good toughness. Moisture permeability test refers to the determination of water vapor transmission rate of multi-microporous sheet materials such as plastic film and composite film. By measuring the water vapor transmission rate, the technical indicators of material performance can be controlled and adjusted.

[0003] For example, patent CN221377616U discloses a PET polyester film moisture permeability testing device. The submersible pump on the spray mechanism of this patent can deliver water from the water storage chamber to a rectangular water collection box via a water pipe. Finally, the water is sprayed out from the atomizing nozzle, automatically spraying water onto the surface of the PET polyester film. The drive motor on the drive mechanism drives the lead screw to rotate clockwise or counterclockwise, which in turn drives the drive screw sleeve to move left and right. The drive screw sleeve can then move the moving frame left and right, allowing the spray mechanism to evenly spray water onto the surface of the PET polyester film clamped and fixed at the bottom of the moving frame. A humidity sensor can be used to test the moisture permeability of the PET polyester film. However, in actual use, when testing the permeability performance of the film under different humidity environments, multiple clamping operations are required, which affects the testing efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a device for testing the moisture permeability of nano-silica polycarbonate films, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a device for testing the moisture permeability of a nano-silica polycarbonate film, comprising a water storage tank and an adjustment component. The top of the water storage tank is connected to a carrier plate via a one-way valve, and a lower partition is disposed inside the carrier plate. A top cover is disposed above the lower partition, and an upper partition is disposed inside the top cover. A connecting component is connected to the outer periphery of the carrier plate. The adjustment component is disposed on one side of the water storage tank and includes a water vapor generator. A water vapor generator is connected to one side of the water storage tank via a pipe, and a humidification box is connected to the top of the water vapor generator. A drying box is connected to one side of the humidification box via a one-way valve, and a dehumidification chamber is disposed inside the drying box. The drying chamber has a filter connected to its bottom, and a hygrometer is installed on the front of both the drying chamber and the humidification chamber. A first pump body is connected to the other side of the humidification chamber, and a first diverter block is installed on the top of the first pump body. A first pressure relief valve is installed on the lower side of the first diverter block and is connected to the humidification chamber through a pipe. A second pump body is fixed to the top of the drying chamber, and a second diverter block is installed on the top of the second pump body. A second pressure relief valve is connected to the lower side of the second diverter block and is connected to the drying chamber through a pipe. A manifold regulating valve is connected to the first diverter block and the second diverter block through a pipe. A first temperature and humidity sensor is installed on the circumference of the carrier plate.

[0006] Furthermore, the manifold regulating valve is fixedly connected to the top cover, and the manifold regulating valve is distributed equidistantly in a circle along the top of the top cover.

[0007] Furthermore, the connecting assembly includes a screw, which is rotatably connected to the outer circumferential surface of the carrier plate. A handle nut is threadedly connected to the upper outer circumference of the screw, and a retaining plate abuts against the bottom of the handle nut. A pressure plate is fixedly connected to the outer circumferential surface of the top cover, and a slider abuts against the bottom of the pressure plate. A sealing rod is fixed to one side of the slider, and one end of the sealing rod abuts against a connecting post. Both ends of the sealing rod are slidably connected to the carrier plate and the lower partition, respectively. A groove is formed on the lower outer circumferential surface of the connecting post, and the connecting post is fixedly connected to the upper partition and slidably connected to the lower partition. A sealing gasket is adhered to one side of the lower and upper partitions, and a sealing ring is fitted and connected to the top outer circumference of the carrier plate.

[0008] Furthermore, the card plate is U-shaped and is fixedly connected to the top cover.

[0009] Furthermore, a temperature control component is disposed on the outer peripheral surface of the top cover, and the temperature control component includes a controller. The controller is fixed on the outer peripheral surface of the top cover, and a heating rod is connected to one side of the controller. A second temperature and humidity sensor is fixed on the inner peripheral surface of the top cover.

[0010] Furthermore, the bottom of the manifold regulating valve is connected to a turbulence-disrupting component, which includes a rotating tube. The bottom of the manifold regulating valve is rotatably connected to the rotating tube, and a branch pipe is connected to the upper outer side of the rotating tube. A turbulence-disrupting plate is fixed to the lower outer side of the rotating tube, and a perforated plate is provided below the turbulence-disrupting plate.

[0011] Furthermore, the branch pipe is arc-shaped and is distributed equidistantly in a circle along the outer circumference of the rotating pipe.

[0012] Furthermore, the perforated plate is fan-shaped and is fixedly connected to the upper partition.

[0013] Furthermore, a recycling component is provided on the upper part of the water storage tank, and the recycling component includes a radiator. The radiator is fixed at the center of the top of the water storage tank, and a thermoelectric cooling plate is provided at the lower part of the radiator. A heat-conducting plate is connected to the bottom of the thermoelectric cooling plate, and a heat-conducting sheet is connected to the bottom of the heat-conducting plate. A flow guide plate is fixed to the bottom of the heat-conducting sheet, and the flow guide plate is fixedly connected to the water storage tank. An exhaust pipe is installed on one side of the water storage tank.

[0014] Furthermore, the heat-conducting sheet is spiral-shaped and has two lines.

[0015] This invention provides a device for testing the moisture permeability of nano-silica polycarbonate films, which has the following advantages:

[0016] 1. This invention utilizes a lower and upper partition to form multiple independent test chambers. This allows for simultaneous and efficient comparative testing of the same sample in multiple environments with different humidity levels when conducting moisture permeability tests on nano-silica polycarbonate films. Repeated disassembly and reassembly are unnecessary. The humidity environment is precisely generated by the humidification and drying units, and the mixing ratio of dry and wet gases input to each chamber is flexibly adjusted via a manifold regulating valve, thereby achieving wide-range humidity control. By comparing the humidity differences on both sides of the sample, its moisture permeability can be quickly and accurately evaluated, significantly improving testing efficiency and data parallelism.

[0017] 2. In this invention, the mixed gas flowing out from the manifold regulating valve is driven by the back thrust of the branch pipe to automatically rotate the rotating tube, which strongly promotes the macroscopic mixing of the gas in the chamber. The synchronously rotating baffle further shears and stirs the airflow. Finally, the airflow flows through the orifice plate to the sample film, thereby ensuring that the airflow acting on the surface of the sample film is highly uniform in terms of humidity and temperature. This effectively eliminates the temperature and humidity stratification and gradient problems caused by traditional static or unidirectional airflow. In addition, the device integrates a closed-loop temperature control system consisting of a heating rod, a second temperature and humidity sensor and a controller, which can accurately control the temperature of the detection environment, thereby simulating the complex and ever-changing real storage or usage climate from standard conditions to complex and ever-changing real storage or usage climate, greatly expanding the application range of the device.

[0018] 3. This invention features a convenient clamping and enhanced sealing structure. When placing the sample, simply loosen the handle nut and turn the screw to release the locking of the clamping plate, easily lifting the top cover. During the lifting process, the upper partition moves the connecting column upward, automatically pushing open the sealing rod to avoid obstruction. After the sample is placed on the lower partition, the top cover is closed, and the locking mechanism is operated in reverse. During the locking process, the sealing gasket ensures a lateral seal at the sample edge. Simultaneously, the inclined surface of the pressure plate drives the slider, forcing the sealing rod to apply a downward concentrated pressure to the connecting column through the groove. This pressure acts directly on the central area of ​​the sample film, effectively preventing the film from developing micro-gaps at the seal due to its own tension relaxation or airflow disturbance. This achieves a reinforced seal from the edge to the center, significantly improving the overall sealing performance of the test chamber and the accuracy of subsequent testing.

[0019] 4. In this invention, the humid airflow in the lower partition enters the water storage tank through a one-way valve. It is first guided by a guide plate and comes into full and prolonged contact with the spirally extended low-temperature heat-conducting fins. The cold end of the thermoelectric cooling fins is cooled by the heat-conducting plate. The humid airflow undergoes efficient heat exchange with the low-temperature wall surface, during which most of the water vapor is condensed and precipitated. This not only recovers the moisture for system recycling but also removes excess humidity from the airflow, preventing environmental interference. The conical guide plate guides the condensate to collect and drip, and the dried airflow is discharged through the exhaust pipe. This condensation process simultaneously lowers the water temperature in the water storage tank. When this pre-cooled water is supplied to the water vapor generator, it reduces unnecessary condensation in the pipes or components during subsequent atomization and evaporation, ensuring the operational stability of the entire humidity generation system and the reliability of the test results. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the device for testing the moisture permeability of a nano-silica polycarbonate film according to the present invention.

[0021] Figure 2 This is a schematic diagram of the carrier disk structure of the moisture permeability testing device for a nano-silica polycarbonate film according to the present invention.

[0022] Figure 3 This is a bottom view of the top cover structure of the moisture permeability testing device for a nano-silica polycarbonate film according to the present invention.

[0023] Figure 4 This is a schematic diagram of the sealing top rod structure of a device for testing the moisture permeability of a nano-silica polycarbonate film according to the present invention;

[0024] Figure 5 This is a schematic diagram of the adjustment component structure of the moisture permeability testing device for a nano-silica polycarbonate film according to the present invention;

[0025] Figure 6This is a schematic diagram of the turbulence component structure of a device for testing the moisture permeability of a nano-silica polycarbonate film according to the present invention.

[0026] Figure 7 This is a schematic diagram of the recycling component structure of a device for testing the moisture permeability of a nano-silica polycarbonate film according to the present invention.

[0027] In the diagram: 1. Water storage tank; 2. Carrier tray; 3. Lower partition; 4. Top cover; 5. Upper partition; 6. Connecting assembly; 601. Screw; 602. Handle nut; 603. Clamping plate; 604. Pressure plate; 605. Sliding block; 606. Sealing top rod; 607. Connecting column; 608. Slot; 609. Sealing gasket; 610. Sealing ring; 7. Adjusting assembly; 701. Water vapor generator; 702. Humidification box; 703. Drying box; 704. Dehumidification filter box; 705. Filter; 706. Hygrometer; 707. First pump body; 708. First diverter block; 709. 710. Pressure relief valve; 711. Second pump body; 712. Second flow divider block; 713. Second pressure relief valve; 714. Combination regulating valve; 8. First temperature and humidity sensor; 9. Temperature control component; 901. Controller; 902. Heating rod; 903. Second temperature and humidity sensor; 10. Baffle assembly; 1001. Rotating pipe; 1002. Branch pipe; 1003. Baffle plate; 1004. Orifice plate; 11. Recovery assembly; 1101. Radiator; 1102. Thermoelectric cooling element; 1103. Heat-conducting plate; 1104. Heat-conducting element; 1105. Flow guide plate; 1106. Exhaust pipe. Detailed Implementation

[0028] Please see Figures 1 to 5This invention provides a technical solution: a device for testing the moisture permeability of a nano-silica polycarbonate film, comprising a water tank 1 and an adjusting component 7. The top of the water tank 1 is connected to a carrier plate 2 via a one-way valve, and a lower partition 3 is disposed inside the carrier plate 2. A top cover 4 is disposed above the lower partition 3, and an upper partition 5 is disposed inside the top cover 4. A connecting component 6 is connected to the outer periphery of the carrier plate 2. The adjusting component 7 is disposed on one side of the water tank 1, and the adjusting component 7 includes a water vapor generator 701. The water tank 1... A water vapor generator 701 is connected to the side via a pipe, and a humidification box 702 is connected to the top of the water vapor generator 701. A drying box 703 is connected to one side of the humidification box 702 via a one-way valve, and a dehumidification filter box 704 is installed inside the drying box 703. A filter 705 is connected to the bottom of the drying box 703, and a hygrometer 706 is installed on the front of the drying box 703 and the humidification box 702. A first pump body 707 is connected to the other side of the humidification box 702, and a first pump body 707 is installed on the top of the first pump body 707. A first diverter block 708 is provided, with a first pressure relief valve 709 installed on one side of its lower portion. The first pressure relief valve 709 is connected to the humidification chamber 702 via a pipe. A second pump body 710 is fixed to the top of the drying chamber 703, and a second diverter block 711 is provided on the top of the second pump body 710. A second pressure relief valve 712 is connected to one side of the lower portion of the second diverter block 711, and the second pressure relief valve 712 is connected to the drying chamber 703 via a pipe. The first diverter block 708 and the second diverter block 711... A manifold regulating valve 713 is connected via a pipe. The manifold regulating valve 713 is fixedly connected to the top cover 4, and the manifold regulating valve 713 is distributed in an equidistant circle along the top of the top cover 4. A first temperature and humidity sensor 8 is installed on the circumferential surface of the carrier plate 2. A temperature control component 9 is installed on the outer circumferential surface of the top cover 4, and the temperature control component 9 includes a controller 901. The controller 901 is fixed on the outer circumferential surface of the top cover 4, and a heating rod 902 is connected to one side of the controller 901. A second temperature and humidity sensor 903 is fixed on the inner circumferential surface of the top cover 4.

[0029] The specific operation is as follows: the lower partition 3 and the upper partition 5 divide the interior of the carrier plate 2 and the top cover 4 into multiple chambers. Therefore, when testing the moisture permeability of the nano-silica polycarbonate film sample, it can be quickly placed in different humidity environments for testing. When controlling the ambient humidity, the water vapor generator 701 atomizes water droplets through the internal ultrasonic atomizer and then evaporates them into water vapor to humidify the humidification chamber 702. The airflow in the drying chamber 703 is filtered by the filter 705 and dehumidified by the desiccant in the dehumidification filter box 704, thus maintaining dryness. The humidity in the humidification chamber 702 and the drying chamber 703 is detected by the hygrometer 706. Therefore, when the first pump body 707 and the second pump body 710 are working, the humid air and dry air are respectively passed through... When the gas is delivered to multiple manifold regulating valves 713 via the pipes on the first and second manifold blocks 708 and 711, the humidity of the airflow inside different chambers of the upper partition 5 can be adjusted by regulating the mixing ratio of dry and wet gas on the manifold regulating valves 713. When the gas after manifolding is discharged from the tail end of the branch pipe 1002 through the rotating pipe 1001, its reaction force drives the rotating pipe 1001 to rotate automatically, causing the sprayed dry and wet mixed gas to be blown out in a rotating sweeping manner. This greatly enhances the macroscopic convection and mixing of the airflow in the upper part of the chamber. At the same time, the rotating pipe 1001 drives the baffle plate 1003 to rotate synchronously, performing secondary shearing and stirring on the air in the upper part of the chamber. Finally, the airflow is divided into segments by the perforated plate 1004 filled with uniform small holes. Numerous fine parallel airflow beams ensure a high degree of uniformity in humidity for the airflow ultimately acting on the sample film surface. This solves the problem of temperature and humidity stratification and large gradients that are easily caused by static or unidirectional airflow. Furthermore, the temperature of the detection environment can be controlled as needed via a closed-loop feedback temperature control component 9 consisting of controller 901, heating rod 902, and second temperature and humidity sensor 903. This allows the equipment to not only test standard temperature and humidity but also simulate the complex and variable storage or usage climate of the real world, thereby expanding the equipment's adaptability. The carrier tray 2, lower partition 3, top cover 4, and upper partition 5 all use heat-insulating materials to reduce interference between different detection chambers. Humidity is then monitored in real time using the second temperature and humidity sensor 903. After water vapor permeates through the sample film, the humidity on the other side of the sample film is detected by the first temperature and humidity sensor 8. By comparing the humidity difference detected by the second temperature and humidity sensor 903 and the first temperature and humidity sensor 8, the moisture permeability of the sample film can be tested. Therefore, during the test, there is no need to repeatedly clamp and change the sample film, thereby improving the testing efficiency. In addition, with the setting of the first pressure relief valve 709 and the second pressure relief valve 712, if the sample film is accidentally completely blocked or the upstream pressure rises abnormally due to gas path failure, the pressure relief valve will open immediately and quickly release the pressure. This effectively prevents safety accidents such as damage to the cavity seal, sensor failure, or even sample explosion caused by overpressure, protecting the safety of the equipment and operators.

[0030] Please see Figures 2 to 4 The connecting assembly 6 includes a screw 601, which is rotatably connected to the outer circumferential surface of the carrier plate 2. A handle nut 602 is threadedly connected to the upper outer circumference of the screw 601, and a retaining plate 603 abuts against the bottom of the handle nut 602. The retaining plate 603 is U-shaped and fixedly connected to the top cover 4. A pressure plate 604 is fixedly connected to the outer circumferential surface of the top cover 4, and a slider 605 abuts against the bottom of the pressure plate 604. A sealing top is fixed to one side of the slider 605. The rod 606 has a sealing top rod 606, one end of which abuts against a connecting post 607. The two ends of the sealing top rod 606 are slidably connected to the carrier plate 2 and the lower partition 3, respectively. A slot 608 is provided on the lower outer circumferential surface of the connecting post 607. The connecting post 607 is fixedly connected to the upper partition 5 and slidably connected to the lower partition 3. A sealing gasket 609 is adhered to one side of the lower partition 3 and the upper partition 5. A sealing ring 610 is fitted and connected to the top of the outer circumference of the carrier plate 2.

[0031] The specific operation is as follows: When placing the sample, simply loosen the handle nut 602 and rotate the screw 601 to release the restriction on the clamping plate 603, allowing the top cover 4 to be lifted and removed from the top of the carrier tray 2. During this process, the upper partition 5 will drive the connecting column 607 to move upwards simultaneously, causing it to push the sealing rod 606 outwards to automatically avoid affecting the disassembly of the top cover 4. Then, place the sample film on the lower partition 3, and close the top cover 4 and carrier tray 2. Subsequently, when the screw 601 is rotated into the groove of the clamping plate 603 and the handle nut 602 is tightened, the top cover 4 moves downwards, allowing the sample to pass through the seal. The pad 609 ensures the seal between the lower spacer 3 and the upper spacer 5 and the sample film. The sealing ring 610 is used to maintain the seal between the carrier plate 2 and the top cover 4. During this process, the bottom of the pressure plate 604 will press the top slope of the slider 605, thereby causing the sealing rod 606 to slide towards the connecting post 607. The sealing rod 606 will apply downward pressure to the connecting post 607 through the slot 608. This is equivalent to applying an additional pressure in the middle area of ​​the sample film, thereby preventing the middle of the sample film from loosening between the sealing pad 609 and the sealing pad, thus enhancing the overall sealing effect and improving the accuracy of subsequent detection.

[0032] Please see Figure 1 , Figure 6 and Figure 7The bottom of the manifold regulating valve 713 is connected to a turbulence-disrupting assembly 10, which includes a rotating pipe 1001. The bottom of the manifold regulating valve 713 is rotatably connected to the rotating pipe 1001, and a branch pipe 1002 is connected to the upper outer side of the rotating pipe 1001. A turbulence-disrupting plate 1003 is fixed to the lower outer side of the rotating pipe 1001, and an orifice plate 1004 is provided below the turbulence-disrupting plate 1003. The branch pipe 1002 is arc-shaped and equidistantly distributed circumferentially along the outer circumference of the rotating pipe 1001. The orifice plate 1004 is fan-shaped and fixedly connected to the upper partition 5. The upper part of the water storage tank 1... The unit is equipped with a recycling component 11, which includes a radiator 1101. The radiator 1101 is fixed at the top center of the water storage tank 1, and a thermoelectric cooling plate 1102 is provided at the bottom of the radiator 1101. A heat-conducting plate 1103 is connected to the bottom of the thermoelectric cooling plate 1102, and a heat-conducting plate 1104 is connected to the bottom of the heat-conducting plate 1103. A guide plate 1105 is fixed to the bottom of the heat-conducting plate 1104, and the guide plate 1105 is fixedly connected to the water storage tank 1. An exhaust pipe 1106 is provided on one side of the water storage tank 1. The heat-conducting plate 1104 is spiral-shaped and has two plates.

[0033] The specific operation is as follows: When the airflow in the lower partition 3 enters the water storage tank 1 through the one-way valve at the bottom of the carrier plate 2, it is blocked by the guide plate 1105, causing it to come into contact with the heat-conducting plate 1104. The cold end of the thermoelectric cooling plate 1102 is attached to the heat-conducting plate 1103 to cool it down. When the humid airflow comes into contact with the low-temperature heat-conducting plate 1104, the water vapor condenses into water droplets, thus recovering some of the water vapor in the airflow. The heat-conducting plate 1104 is designed in a spiral shape, forcing the airflow to have a long-term and large-area full contact with the low-temperature surface along the spiral path, which greatly increases the heat exchange between the water vapor and the cold wall surface. The efficiency allows for the efficient condensation and precipitation of most of the water vapor in the airflow. This not only recovers the water for recycling but also removes excessive humidity from the airflow, preventing interference with the surrounding environment. Furthermore, the conical distribution of the guide plate 1105 allows condensed water droplets to drip from the central hole under gravity, while the airflow is discharged through the exhaust pipe 1106. In addition, this mechanism can lower the water temperature inside the water storage tank 1, so that the lower-temperature water, after being atomized and evaporated by the water vapor generator 701, will not condense into water droplets inside the equipment components with a temperature higher than that of water vapor, which is beneficial to the stable conduct of the experiment.

[0034] In summary, this device for testing the moisture permeability of nano-silica polycarbonate films is used as follows:

[0035] First, when placing the sample, loosen the handle nut 602 and rotate the screw 601 to release the restriction on the clamping plate 603, allowing the top cover 4 to be lifted and removed from the top of the carrier tray 2. During this process, the upper partition 5 will drive the connecting column 607 to move upwards simultaneously, causing it to push the sealing rod 606 outwards to automatically avoid interfering with the disassembly of the top cover 4. Then, place the sample film on the lower partition 3, and close the top cover 4 and carrier tray 2. Subsequently, when the screw 601 is rotated into the groove of the clamping plate 603 and the handle nut 602 is tightened, the top cover 4 moves downwards, allowing the sealing gasket 60 to pass through. 9. Ensure the sealing between the lower spacer 3 and the upper spacer 5 and the sample film. The sealing ring 610 is used to maintain the seal between the carrier plate 2 and the top cover 4. During this process, the bottom of the pressure plate 604 will press the top slope of the slider 605, thereby causing the sealing rod 606 to slide towards the connecting post 607. The sealing rod 606 will apply downward pressure to the connecting post 607 through the slot 608. This is equivalent to applying an additional pressure in the middle area of ​​the sample film, thereby preventing the middle of the sample film from loosening between the sealing gasket 609 and the sealing effect, thus enhancing the overall sealing effect and improving the accuracy of subsequent detection.

[0036] Secondly, the water vapor generator 701 atomizes water droplets through an internal ultrasonic atomizer and then evaporates them into water vapor to humidify the humidification box 702. Meanwhile, the airflow in the drying box 703 is filtered by the filter 705 and dehumidified by the desiccant in the dehumidification filter box 704, thus keeping it dry. The humidity in the humidification box 702 and the drying box 703 is detected by the hygrometer 706. Therefore, when the first pump body 707 and the second pump body 710 are working, and the humid air and dry air are respectively transported to the multiple manifold regulating valves 713 through the pipes on the first manifold block 708 and the second manifold block 711, the humidity of the airflow inside the different chambers of the upper partition 5 can be adjusted by adjusting the mixing ratio of dry air and humid air on the manifold regulating valves 713.

[0037] Next, when the converging gas is discharged from the tail end of the branch pipe 1002 through the rotating tube 1001, its reaction force drives the rotating tube 1001 to rotate automatically, causing the sprayed dry and wet mixed gas to be blown out in a rotating sweeping manner. This greatly enhances the macroscopic convection and mixing of the airflow in the upper part of the chamber. At the same time, the rotating tube 1001 drives the baffle plate 1003 to rotate synchronously, performing secondary shearing and stirring on the air in the upper part of the chamber. Finally, the airflow passes through the perforated plate 1004 with uniform small holes and is divided into a large number of fine parallel streams, ensuring that the airflow acting on the sample film surface achieves a high degree of uniformity in humidity. In addition, the temperature of the detection environment can be controlled by the closed-loop feedback temperature control component 9 composed of the controller 901, the heating rod 902, and the second temperature and humidity sensor 903, according to the needs. This allows the equipment to not only test standard temperature and humidity, but also simulate the complex and ever-changing storage or usage climate in the real world, thereby expanding the adaptability of the equipment.

[0038] Then, the humidity is detected in real time using the second temperature and humidity sensor 903. After water vapor permeates through the sample film, the humidity on the other side of the sample film is detected using the first temperature and humidity sensor 8. By comparing the humidity difference detected by the second temperature and humidity sensor 903 and the first temperature and humidity sensor 8, the moisture permeability of the sample film can be tested. Thus, during the test, there is no need to clamp and replace the sample film multiple times, thereby improving the testing efficiency. In addition, with the setting of the first pressure relief valve 709 and the second pressure relief valve 712, once the sample film is accidentally completely blocked or the upstream pressure rises abnormally due to gas path failure, the pressure relief valve will open immediately and quickly release the pressure. This effectively prevents safety accidents such as damage to the cavity seal, sensor failure, or even sample explosion caused by overpressure, and protects the safety of the equipment and operators.

[0039] Finally, when the airflow in the lower partition 3 enters the water storage tank 1 through the one-way valve at the bottom of the carrier plate 2, it is blocked by the guide plate 1105, causing it to come into contact with the heat-conducting plate 1104. The cold end of the thermoelectric cooling plate 1102 is attached to the heat-conducting plate 1103 to cool it down. When the humid airflow comes into contact with the low-temperature heat-conducting plate 1104, the water vapor condenses into water droplets, thus recovering some of the water vapor in the airflow. The heat-conducting plate 1104 is designed in a spiral shape, forcing the airflow to fully interact with the low-temperature surface over a long period of time along the spiral path. The contact greatly increases the heat exchange efficiency between water vapor and the cold wall surface, enabling the efficient condensation and precipitation of most of the water vapor in the airflow. Furthermore, the conical distribution of the guide plate 1105 allows condensed water droplets to drip from the central hole under gravity, while the airflow is discharged through the exhaust pipe 1106. In addition, this mechanism can also reduce the water temperature inside the water storage tank 1, so that the lower-temperature water, after being atomized and evaporated by the water vapor generator 701, will not condense into water droplets inside the equipment components with a temperature higher than that of water vapor, which is beneficial to the stable conduct of the experiment.

[0040] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A device for testing the moisture permeability of a nano-silica polycarbonate film, characterized in that, The system includes a water storage tank (1) and an adjusting assembly (7). The top of the water storage tank (1) is connected to a carrier plate (2) via a one-way valve. A lower partition (3) is installed inside the carrier plate (2). A top cover (4) is installed above the lower partition (3), and an upper partition (5) is installed inside the top cover (4). A connecting assembly (6) is connected to the outer periphery of the carrier plate (2). The adjusting assembly (7) is located on one side of the water storage tank (1) and includes a water vapor generator (701). The water vapor generator (701) is connected to one side of the water storage tank (1) via a pipe. A humidifying box (702) is connected to the top of the water vapor generator (701). A drying box is connected to one side of the humidifying box (702) via a one-way valve. (703), and the drying box (703) is equipped with a dehumidifying filter box (704) inside. The bottom of the drying box (703) is connected to a filter (705). A hygrometer (706) is installed on the front of the drying box (703) and the humidifying box (702). A first pump body (707) is connected to the other side of the humidifying box (702). A first diverter block (708) is installed on the top of the first pump body (707). A first pressure relief valve (709) is installed on the lower side of the first diverter block (708). The first pressure relief valve (709) is connected to the humidifying box (702) through a pipe. A second pump body (710) is fixed on the top of the drying box (703). A second pump body (710) is installed on the top of the second pump body (710). The second diversion block (711) has a second pressure relief valve (712) connected to its lower side, and the second pressure relief valve (712) is connected to the drying chamber (703) through a pipe. The first diversion block (708) and the second diversion block (711) are connected to a manifold regulating valve (713) through a pipe. The circumferential surface of the carrier plate (2) is provided with a first temperature and humidity sensor (8). The connecting assembly (6) includes a screw (601). The outer circumferential surface of the carrier plate (2) is rotatably connected to the screw (601), and the upper outer circumferential surface of the screw (601) is threaded with a handle nut (602). The bottom of the handle nut (602) abuts against a retaining plate (603). The outer circumferential surface of the top cover (4) is fixed. A pressure plate (604) is fixedly connected, and a slider (605) abuts against the bottom of the pressure plate (604). A sealing rod (606) is fixed on one side of the slider (605), and a connecting post (607) abuts against one end of the sealing rod (606). The two ends of the sealing rod (606) are slidably connected to the carrier (2) and the lower partition (3) respectively. A slot (608) is opened on the lower outer circumference of the connecting post (607). The connecting post (607) is fixedly connected to the upper partition (5), and the connecting post (607) is slidably connected to the lower partition (3). A sealing gasket (609) is glued to one side of the lower partition (3) and the upper partition (5). A sealing ring (610) is fitted and connected to the top of the outer circumference of the carrier (2).

2. The device for testing the moisture permeability of a nano-silica polycarbonate film according to claim 1, characterized in that, The manifold regulating valve (713) is fixedly connected to the top cover (4), and the manifold regulating valve (713) is equidistantly distributed in a circle along the top of the top cover (4).

3. The device for testing the moisture permeability of a nano-silica polycarbonate film according to claim 1, characterized in that, The card plate (603) is U-shaped and is fixedly connected to the top cover (4).

4. The device for testing the moisture permeability of a nano-silica polycarbonate film according to claim 1, characterized in that, A temperature control component (9) is disposed on the outer peripheral surface of the top cover (4), and the temperature control component (9) includes a controller (901). The controller (901) is fixed on the outer peripheral surface of the top cover (4), and a heating rod (902) is connected to one side of the controller (901). A second temperature and humidity sensor (903) is fixed on the inner peripheral surface of the top cover (4).

5. The device for testing the moisture permeability of a nano-silica polycarbonate film according to claim 1, characterized in that, The bottom of the manifold regulating valve (713) is connected to a turbulence assembly (10), and the turbulence assembly (10) includes a rotating pipe (1001). The bottom of the manifold regulating valve (713) is rotatably connected to the rotating pipe (1001), and the upper outer side of the rotating pipe (1001) is connected to a branch pipe (1002). The lower outer side of the rotating pipe (1001) is fixed with a turbulence plate (1003), and a perforated plate (1004) is provided below the turbulence plate (1003).

6. The device for testing the moisture permeability of a nano-silica polycarbonate film according to claim 5, characterized in that, The branch pipe (1002) is arc-shaped, and the branch pipe (1002) is distributed in an equidistant circle along the outer circumference of the rotating pipe (1001).

7. The device for testing the moisture permeability of a nano-silica polycarbonate film according to claim 5, characterized in that, The perforated plate (1004) is fan-shaped and is fixedly connected to the upper partition (5).

8. The device for testing the moisture permeability of a nano-silica polycarbonate film according to claim 1, characterized in that, The upper part of the water storage tank (1) is provided with a recycling component (11), and the recycling component (11) includes a radiator (1101). The radiator (1101) is fixed at the center of the top of the water storage tank (1), and a thermoelectric cooling plate (1102) is provided at the lower part of the radiator (1101). A heat-conducting plate (1103) is connected to the bottom of the thermoelectric cooling plate (1102), and a heat-conducting sheet (1104) is connected to the bottom of the heat-conducting plate (1103). A flow guide plate (1105) is fixed to the bottom of the heat-conducting sheet (1104), and the flow guide plate (1105) is fixedly connected to the water storage tank (1). An exhaust pipe (1106) is installed on one side of the water storage tank (1).

9. The device for testing the moisture permeability of a nano-silica polycarbonate film according to claim 8, characterized in that, The heat-conducting plate (1104) is spiral-shaped and has two lines.

Images