Performance testing device based on nanometer titanium dioxide photocatalysis screen virus disinfection

Abstract

The invention belongs to the technical field of photocatalytic screen testing, and particularly discloses a performance testing device for virus disinfection and killing of a photocatalytic screen based on nano titanium dioxide, comprising: an air bag having a first inner cavity and a second inner cavity; the second inner cavity is isolated from the first inner cavity; the photocatalytic screen is mounted in the first inner cavity; the lighting part is installed on the air bag, and the light-emitting end of the lighting part penetrates through the second inner cavity and extends into the first inner cavity; the first inner cavity is matched with the lighting part so as to adapt to the working condition of the photocatalytic screen; the air supply part is provided with an air supply channel; the first inner cavity, the second inner cavity and the air supply channel jointly form a circulating gas path, and the circulating gas path is used for allowing internal test gas to circularly flow through the photocatalytic screen; according to the present invention, with the optimized inner cavity structure, the direct illumination and the closed circulation gas path, the efficient photocatalytic efficiency and the gas use are achieved, the multi-environment test is adapted, the operation condition is optimized, the energy is saved, and the performance is accurately evaluated.

Description

Technical Field

[0001] This invention relates to the field of photocatalytic screen testing technology, and more specifically, to a performance testing device for virus elimination based on nano-titanium dioxide photocatalytic screens. Background Technology

[0002] The technology of using nano-titanium dioxide photocatalytic screens for virus elimination combines advanced research in nanoscience, photochemistry, and virology. The core technology involves using nano-sized titanium dioxide as a photocatalyst, which is activated by light to eliminate viruses. Titanium dioxide (TiO2), due to its excellent photocatalytic performance, stability, and safety, has been widely studied and applied in air purification, water treatment, and surface disinfection. The development of nano-titanium dioxide photocatalytic screens focuses on utilizing the highly efficient surface activity and strong oxidizing properties of nanomaterials. When light (usually ultraviolet light) irradiates the surface of nano-titanium dioxide, reactive oxygen species, such as free radicals, are generated. These reactive species can effectively decompose the virus structure, thereby achieving the purpose of eliminating viruses.

[0003] While nano-titanium dioxide photocatalytic sieves theoretically possess the potential for highly efficient virus elimination, several challenges remain in practical applications. These include improving photocatalytic efficiency, ensuring long-term stability, and preventing the release of nanoparticles. Therefore, there is an urgent need for a testing device capable of comprehensively evaluating the elimination effect of nano-titanium dioxide photocatalytic sieves under various operating conditions.

[0004] To address these issues, a performance testing device for virus elimination based on nano-titanium dioxide photocatalytic sieves is proposed. Summary of the Invention

[0005] In view of this, a first aspect of the present invention is to provide a performance testing device for virus elimination based on a nano-titanium dioxide photocatalytic screen.

[0006] A first aspect of the present invention provides a performance testing device for virus elimination based on a nano-titanium dioxide photocatalytic screen, comprising: an airbag having a first inner cavity and a second inner cavity; the second inner cavity being isolated from the first inner cavity and circumferentially disposed outside the first inner cavity; the photocatalytic screen being installed inside the first inner cavity; an illumination unit being installed on the airbag, wherein the light-emitting end of the illumination unit penetrates the second inner cavity and extends into the interior of the first inner cavity; the first inner cavity cooperating with the illumination unit to adapt to the operating conditions of the photocatalytic screen; and an air supply unit having an air supply channel; the first inner cavity, the second inner cavity, and the air supply channel together forming a circulating air path, the circulating air path being used to circulate the internal test gas through the photocatalytic screen to obtain the operating time of the photocatalytic screen in treating the test gas under the operating conditions, the operating time being used to characterize the performance of the photocatalytic screen.

[0007] In any of the above technical solutions, the airbag includes: a first flexible bag with an inner wall forming the first inner cavity; a second flexible bag fitted over the outside of the first flexible bag; the inner wall of the second flexible bag and the outer wall of the first flexible bag forming the second inner cavity; the first flexible bag and the second flexible bag are connected by a plurality of conductive components, and the first inner cavity is connected to a detection container through the conductive components, the detection container being used to obtain the virus content per unit volume of the test gas at the current moment.

[0008] In any of the above technical solutions, along the flow direction of the test gas in the first inner cavity, the cross-sectional area of ​​the second inner cavity is smaller than the cross-sectional area of ​​the first inner cavity.

[0009] In any of the above technical solutions, the guiding component penetrates the first flexible bag and the second flexible bag respectively, and the guiding component has a third inner cavity that communicates with the first inner cavity; wherein, the lighting part is installed on the inner wall of the third inner cavity near the first flexible bag to block or open the first inner cavity; the lighting part covers the connection between the detection container and the guiding component.

[0010] In any of the above technical solutions, the operating conditions include operating brightness and operating air volume, and have the following situations: Situation 1, by adjusting the number of the lighting units and / or the light intensity of the light-emitting end of a single lighting unit, the operating brightness of the photocatalytic screen is adapted; Situation 2, by setting the distance between all the lighting units and the photocatalytic screen, the volume of the first inner cavity relative to the second inner cavity is adjusted, and the operating air volume of the photocatalytic screen is adapted.

[0011] In any of the above technical solutions, the conductive component is rigid, and the end of the lighting part away from the first flexible bag is fixedly connected to the rod; all the conductive components and the connected lighting part and the rod constitute a bracket for supporting the first flexible bag.

[0012] In any of the above technical solutions, the first flexible bag and the second flexible bag are respectively provided with two gas mixing ports that connect to the air supply channel; along the flow direction of the test gas in the first inner cavity, all the detection containers are located between the photocatalytic screen and the gas mixing port for outputting the test gas.

[0013] In any of the above technical solutions, if the distance between the two gas mixing ports of the first flexible bag is 'a', and the flow velocity of the test gas at the current moment is 'b', then the operation time 't' is obtained using the following formula: Wherein, k is the change in the viral content per unit volume of the test gas, and each of the detection containers is used to obtain the viral content per unit volume of the test gas at different times.

[0014] In any of the above technical solutions, the two sets of branch channels can move relative to each other to adjust the distance between the two gas mixing ports of the first flexible bag.

[0015] In any of the above technical solutions, the air supply channel includes two sets of branch channels, each set of branch channels being connected to the mixing port of the first flexible bag and the second flexible bag respectively; and a damper is provided on one set of branch channels to control the first inner cavity and the second inner cavity respectively.

[0016] The beneficial effects of this invention compared to the prior art are as follows:

[0017] The first and second inner cavities not only provide the ability to isolate different environmental conditions, but also allow for adjustments to the size and shape of the cavities to adapt to different testing and application needs. This enhances the system's adaptability to different operating conditions, enabling the simulation and testing of the photocatalytic screen's performance under various environments.

[0018] The light-emitting end of the lighting section is designed to pass through the second inner cavity and reach the first inner cavity directly, ensuring that the light energy directly irradiates the photocatalytic screen, improving photocatalytic efficiency, reducing light energy loss, and enhancing the effect of photocatalytic reaction.

[0019] A closed-loop gas path is formed through the air supply channel provided by the air supply unit, allowing the internal test gas to continuously circulate through the photocatalytic screen. This recycling design improves gas utilization efficiency, reduces the need for fresh air, and thus reduces energy consumption. The circulating gas path allows for continuous monitoring and adjustment of the gas flow rate through the photocatalytic screen to obtain optimal photocatalytic treatment time. This facilitates accurate evaluation of the photocatalytic screen's performance and adjustment of operating parameters based on actual results.

[0020] Additional aspects and advantages of embodiments of the invention will become apparent in the following description or may be learned by practice of embodiments of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the tributary channel and its connection structure according to the present invention;

[0024] Figure 3 This is a schematic diagram of the airbag structure after partial cross-section of the present invention;

[0025] Figure 4 This is a schematic diagram of the detection container and its connection structure of the present invention;

[0026] Figure 5 This is a schematic diagram of the return air duct and its connection structure according to the present invention.

[0027] in, Figures 1-5 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0028] 1. Airbag, 101. First inner cavity, 102. Second inner cavity, 103. First flexible bag, 104. Second flexible bag, 105. Mixing port, 2. Illumination unit, 201. Lamp bead, 202. Sealing column, 203. Annular groove, 3. Air supply unit, 301. Branch channel, 302. Air valve, 303. Air pump, 304. Annular air guide shell, 305. Impeller, 306. Return air channel, 4. Conducting component, 401. Third inner cavity, 402. Air outlet pipe, 403. Rod body, 5. Detection container, 6. Air inlet, 601. Conical tube, 602. Air inlet pipe, 603. Test gas inlet bottle, 7. Base, 8. Support frame. Detailed Implementation

[0029] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0031] Please see Figures 1-5 The following describes a performance testing device for virus elimination based on a nano-titanium dioxide photocatalytic screen, according to some embodiments of the present invention.

[0032] The first aspect of this invention provides a performance testing device for virus elimination based on a nano-titanium dioxide photocatalytic sieve. In some embodiments of this invention, such as... Figures 1-5 As shown, the performance testing device includes:

[0033] The airbag 1 has a first inner cavity 101 and a second inner cavity 102; the second inner cavity 102 is isolated from the first inner cavity 101 and is circumferentially arranged outside the first inner cavity 101; a photocatalytic screen is installed inside the first inner cavity 101, and a strap for fixing the photocatalytic screen is fixedly connected to the inner wall of the first inner cavity 101, and the first inner cavity 101 forms an airflow containment environment for testing the photocatalytic screen in actual use. Furthermore, the structure of the airbag 1 facilitates the adaptation and simulation of the photocatalytic screen in spaces of different sizes and shapes.

[0034] An illumination unit 2 is installed on the airbag 1, with its light-emitting end penetrating the second inner cavity 102 and extending into the interior of the first inner cavity 101. This allows for illumination of the first inner cavity 101 while simultaneously placing the connecting wires of the illumination unit 2 outside the airbag 1. The first inner cavity 101 cooperates with the illumination unit 2 to adapt to the operating conditions of the photocatalytic screen. Since the photocatalytic screen requires illumination for catalytic operation in actual work, the illumination unit 2 is installed on the airbag 1 to enable the photocatalytic screen to properly filter and disinfect airflows carrying viruses. Through the first inner cavity 101, which can freely deform and change size, and the illumination unit 2, which can freely change its illumination intensity, the photocatalytic screen can be adapted and simulated in most practical application scenarios.

[0035] The air supply unit 3 has an air supply channel for conveying airflow to the photocatalytic screen; the first inner cavity 101, the second inner cavity 102 and the air supply channel together form a circulating air path, which is used to allow the internal test gas to circulate through the photocatalytic screen to obtain the working time of the photocatalytic screen in processing the test gas under working conditions. The working time is used to characterize the performance of the photocatalytic screen.

[0036] This invention provides a performance testing device for virus elimination based on a nano-titanium dioxide photocatalytic screen. The first inner cavity 101 is primarily used for installing and testing the photocatalytic screen. This cavity contains straps to secure the screen, ensuring it maintains appropriate tension and position during testing. The second inner cavity 102 is located around the first inner cavity 101, circumferentially surrounding it. The main function of the second inner cavity 102 is as an adjustment chamber, allowing adjustment of the shape and size of the first inner cavity 101 by changing its internal air pressure, simulating different usage environments. The photocatalytic screen is installed inside the first inner cavity 101 to test its photocatalytic effect under different airflow conditions, particularly its ability to eliminate viruses.

[0037] The testing environment is achieved through a first inner cavity 101, in which a screen is fixed and exposed to a controlled airflow. An external gas source can input an airflow with a specific velocity and containing test viruses or other contaminants into the first inner cavity 101. The photocatalytic activity of the screen is activated by an external ultraviolet light source, and the generated reactive oxygen species (such as hydroxyl radicals) effectively decompose contaminants passing through the screen. The pressure of the second inner cavity 102 is adjustable; by inflating or deflating, the volume and shape of the first inner cavity 101 can be changed, thus simulating larger or smaller spatial conditions. This function allows the airbag 1 to adapt to different testing environments, such as rooms or passageways of different sizes. It provides a convenient way to study the effects of photocatalytic screens on various physical spatial conditions that may be encountered in practical applications. The operation of the airbag 1 can be achieved through a manual or automatic control system, including airflow velocity, gas composition, light intensity, and ultraviolet light wavelength. A data collection system can monitor and record key parameters during the testing process, such as gas flow rate, light conditions, pressure difference inside and outside the airbag 1, and virus content before and after the photocatalytic reaction.

[0038] The lighting unit 2 includes a light-emitting element (typically an LED lamp) with high efficiency, long lifespan, and suitable spectral output, particularly ultraviolet light, to activate the photocatalytic properties of titanium dioxide. The light-emitting end passes through the second inner cavity 102 and extends into the interior of the first inner cavity 101. This design allows the light source to directly illuminate the photocatalytic screen installed within the first inner cavity 101, while connecting parts such as wires remain outside the airbag 1, enhancing the safety and convenience of the equipment. The wires connect to an external power supply and control system, allowing the user to adjust the light intensity and duration as needed to adapt to different testing conditions and requirements.

[0039] The photocatalytic screen relies on ultraviolet light to activate the titanium dioxide on its surface, generating free radicals capable of decomposing viruses and other organic pollutants. The ultraviolet LED lamps in the lighting unit 2 provide the necessary light energy to ensure sufficient activation of the titanium dioxide on the screen surface. The position and direction of the light source are designed to ensure uniform illumination across the entire screen, maximizing light efficiency and disinfection effectiveness. The control system can adjust the light intensity and illumination time according to test conditions or actual application needs. For example, in scenarios requiring stronger disinfection effects, the light intensity can be increased or the illumination time extended. The flexible design of the lighting unit 2 supports varying lighting requirements, adapting to different lighting conditions from compact to large spaces. The external design of wiring and other electrical components not only facilitates maintenance and operation but also increases safety during use, avoiding the risk of wiring coming into contact with gases or water. The use of high-efficiency LED lamps offers advantages such as high energy efficiency and low heat generation, making them suitable for long-term continuous use. The deformability and size-adjustable nature of the first inner cavity 101 allows for the simulation of different spatial environments, while the adjustable capability of the lighting section 2 ensures that the photocatalytic screen receives sufficient illumination in these different environments, thereby testing and verifying the screen's performance under various conditions.

[0040] The air supply channel is a key component of the airbag system 1, used to deliver gas to the photocatalytic screen in the first inner cavity 101. This channel is designed to ensure uniform and efficient airflow to guarantee the accuracy and repeatability of the test. A fan or compressor is located at the beginning of the air supply channel to generate sufficient air pressure to drive the gas through the photocatalytic screen. Selecting an appropriate fan or compressor can provide different air speeds and pressures as needed. A regulating valve and control system are used to adjust the speed and volume of the airflow, ensuring precise control of the gas flow rate through the screen under different test conditions.

[0041] The air supply unit 3 uses a fan or compressor to push gas into the photocatalytic screen in the first inner cavity 101. The gas flows over the screen, contacting its surface and triggering a photocatalytic reaction. After being treated by the photocatalytic screen, the gas flows out of the first inner cavity 101 and, after adjustment, may be recirculated back into the air supply channel, forming a closed-loop system. This design allows for continuous testing of the gas's effect on the photocatalytic screen, improving testing efficiency and accuracy. The control system accurately measures the residence time (working time) of the gas on the photocatalytic screen. This time is a crucial parameter for evaluating the screen's photocatalytic performance, directly related to the time required for the screen to process a specific amount of gas. The working time can be adjusted according to different testing requirements by adjusting the fan speed or changing the gas flow rate via a regulating valve. The gas passing through the screen can be sampled and analyzed through a designated sampling port to determine the change in pollutant concentration before and after photocatalysis, thereby evaluating the screen's purification effect. By comparing the purification effects under different working times, the optimal photocatalytic conditions can be determined, optimizing the screen's performance.

[0042] Furthermore, the performance testing apparatus also includes:

[0043] Base 7 is used to install airbag 1 and air supply unit 3.

[0044] Here, the base 7 is typically designed to be robust enough to support the weight of the entire testing setup, including the airbag 1, air supply unit 3, lighting unit 2, and other auxiliary equipment. Its design usually takes into account ease of operation and equipment maintenance needs. Depending on the size and weight of the equipment, the material of the base 7 needs to be selected to withstand long-term use and maintain shape stability, such as steel, aluminum, or heavy-duty plastic. The base 7 is designed with dedicated mounting interfaces and fixing points to secure the main components such as the airbag 1 and air supply unit 3 in proper positions, ensuring their stability and correct alignment during testing. For convenient power management and data transmission, the base 7 may also integrate electrical interfaces, such as cable management systems and connection ports, for connecting the motors of the lighting unit 2 and air supply unit 3, and the data acquisition system.

[0045] As described above, base 7 provides a solid foundation, ensuring the stability of airbag 1 during inflation, deflation, and testing, preventing any testing errors or equipment damage caused by equipment movement or tilting. It simplifies equipment operation by providing user-accessible control panels and maintenance interfaces. Furthermore, the well-designed base 7 prioritizes operator safety, avoiding sharp angles and protruding parts to ensure a safe operating environment. Base 7 allows for the orderly and systematic integration of components, contributing to the maintenance of system integrity and functionality. For example, a rational layout and component arrangement optimizes gas flow paths, reducing turbulence and dead zones in the airflow. It also allows for quick replacement or upgrades of components, such as replacing worn air supply units or upgrading the lighting system, thereby extending equipment lifespan and adapting to new testing requirements.

[0046] In any of the above embodiments, the airbag 1 includes a first flexible bag 103 and a second flexible bag 104.

[0047] The inner wall of the first flexible bag 103 forms the first inner cavity 101.

[0048] The second flexible bag 104 is fitted over the first flexible bag 103; the inner wall of the second flexible bag 104 and the outer wall of the first flexible bag 103 form a second inner cavity 102. The first flexible bag 103 and the second flexible bag 104 form a double-layer structure, which on the one hand can avoid excessive impact on the airbag 1 when excessive internal pressure is generated, and on the other hand, by placing the second flexible bag 104 over the first flexible bag 103, the treatment status of the test gas after passing through the photocatalytic screen and without passing through the photocatalytic screen can be obtained at the same time, which is convenient for calculating the purification performance.

[0049] The first flexible bag 103 and the second flexible bag 104 are connected by multiple conductive components 4. The first inner cavity 101 is connected to the detection container 5 through the conductive components 4. The detection container 5 is used to obtain the virus content per unit volume of the test gas at the current moment. The detection container 5 is pre-stored with test strips for the relevant type of virus for passive, real-time testing. The detection container 5 is made of a soft, transparent material so that there is no other gas inside before the test gas fills the detection container 5, and the test results of the internal test strips can be observed. For the common volume of the first flexible bag 103 and the second flexible bag 104, the common additional volume of all the detection containers 5 should not exceed a certain proportion of the common volume, which is the proportion of the allowable error range of the test strips.

[0050] In this embodiment, the first flexible bag 103 serves as the inner bag, forming a first inner cavity 101, which directly wraps the photocatalytic screen. It is primarily used for practical testing of the photocatalytic screen's purification performance under specific airflow conditions. The first inner cavity 101 is typically used to pass through specific test gases, which undergo chemical reactions upon passing through the photocatalytic screen. The second flexible bag 104 serves as the outer bag, fitted over the first flexible bag 103, forming a second inner cavity 102 with the first flexible bag 103. The second inner cavity 102 provides a reference environment for passing gases that have not been treated by the photocatalytic screen, allowing for performance comparison and analysis.

[0051] In the dual-layer design, the presence of the second flexible bag 104 not only provides physical protection for the first flexible bag 103, reducing the damage to sensitive internal components (such as the photocatalytic screen) from direct external impacts, but also balances the internal and external gas pressures, preventing the first flexible bag 103 from rupturing due to the high pressure generated by internal reactions. During high-pressure gas treatment, the second inner cavity 102 acts as a buffer, reducing the impact of pressure fluctuations on the overall equipment. The independent airflow paths of the first inner cavity 101 and the second inner cavity 102 allow the testing device to simultaneously compare and analyze gases that have passed through and have not been treated by the photocatalytic screen. This design allows for real-time monitoring and recording of the purification effect of the photocatalytic screen. By comparing the differences in chemical composition and pollutant concentration of the gases in the two inner cavities, the removal rate and efficiency of the photocatalytic screen can be accurately calculated. This method is very suitable for scientific research testing because it provides a control group (gas in the second inner cavity 102) and an experimental group (gas in the first inner cavity 101), making data analysis more accurate and scientific. The design of the first flexible bag 103 and the second flexible bag 104 should take into account ease of operation, such as providing appropriate interfaces and channels to facilitate gas input and output, and suitable installation positions for related sensors to monitor parameters such as temperature, pressure, and gas composition. The data acquisition system can be integrated into the base 7 or the main control system to collect data from the two inner chambers in real time, automatically record and process the data, and provide support for subsequent analysis.

[0052] The test container 5 is made of a transparent, flexible material, typically flexible plastic or a special synthetic material, to ensure it can completely collapse without external pressure, preventing pre-existing air from entering before testing. The transparency allows test results to be obtained directly through visual inspection, without opening the container or using other equipment. The test container 5 contains pre-stored test strips for specific viruses. These strips change color upon contact with the virus, providing rapid and intuitive test results. The type and sensitivity of the test strips depend on the target virus; strips suitable for detecting specific viruses must be selected. The first flexible bag 103 and the second flexible bag 104 are connected by multiple conductive components 4. These components ensure that gas can flow from the first inner cavity 101 to the test container 5 without affecting the gas environment of the second inner cavity 102. The conductive components 4 are designed to effectively control the airflow direction and rate, ensuring the purity and representativeness of the gas within the test container 5.

[0053] When the test gas enters the detection container 5 from the first flexible bag 103 through the conductive component 4, the test strip inside immediately reacts with the virus in the gas. Because the test strip is designed for a specific virus, it can quickly indicate the presence and concentration level of the virus. The degree of color change can be preset to correspond to different virus concentrations, providing the operator with immediate and intuitive data. The total additional volume of all detection containers 5 does not exceed a certain proportion of the common volume of the first and second flexible bags 104. This proportion is designed to ensure accuracy within the error range of the test strip and prevent too much or too little test gas from affecting the results. The size and number of detection containers 5 are ensured to meet the overall design requirements to maintain the balance and functionality of the entire system. The transparent material allows the operator to directly observe the reaction of the test strip without the need for complex equipment, simplifying the operation process. The flexible material of the container allows it to completely collapse when not inflated, ensuring that there is no other gas inside the container before gas injection, guaranteeing the accuracy of the test.

[0054] Furthermore, each conductive component 4 includes a conductive tube, which passes through the first flexible bag 103 and the second flexible bag 104 respectively, and the outer wall of the conductive tube is fixedly connected to the penetration point to form a seal. An air outlet pipe 402 is installed on the end side wall of the conductive tube away from the first flexible bag 103 and the second flexible bag 104, and the air outlet pipe 402 is connected to the conductive tube.

[0055] Here, the conduit is designed to penetrate the first flexible bag 103 and the second flexible bag 104. Its outer wall is fixedly connected to and sealed with the bag wall at the penetration point to ensure no gas leakage and maintain the integrity of the system and the accuracy of the test. Materials are typically chosen that are pressure-resistant and corrosion-resistant, such as stainless steel or specific high-strength plastics, to withstand possible chemical or physical influences. An outlet pipe 402 is installed on the end sidewall of the conduit to smoothly guide the gas flowing from the first flexible bag 103 through the conduit into the detection container 5. The design of the outlet pipe 402 takes into account the smoothness and control of airflow, ensuring that the gas can enter the detection container 5 directly and completely without additional processing or long-distance transmission.

[0056] As described above, when the connecting tube penetrates the first flexible bag 103 and the second flexible bag 104, the sealing of the connection point must be ensured. This is achieved by using a dedicated sealing ring or sealant to prevent gas leakage during the test and ensure the accuracy of the test data. Sealing also helps maintain the pressure stability of the entire system, which is particularly important for some tests that rely on pressure differences. The design of the connecting tube ensures that gas can be directly delivered from the first flexible bag 103 to the test container 5. This direct delivery reduces potential contamination or compositional changes during gas transmission, improving the reliability of the test. The arrangement of the outlet pipe 402 allows for precise control of the direction and flow rate of the gas before it enters the test container 5, optimizing the reaction conditions of the test strip. Before the test begins, ensure that all connecting components 4 are correctly installed and well-sealed to prevent any external gas interference. During the test, the operator can adjust the gas flow rate and volume through the control system, flexibly configuring the test as needed to obtain the best test results.

[0057] In any of the above embodiments, along the flow direction of the test gas in the first inner cavity 101, the cross-sectional area of ​​the second inner cavity 102 is smaller than that of the first inner cavity 101. By limiting the cross-sectional areas of the first inner cavity 101 and the second inner cavity 102, the velocity of the test gas passing through the second inner cavity 102 can be greater than the velocity of the test gas passing through the first inner cavity 101, forming an outward suction force on the outer side of the second flexible bag 104 as a whole. This can help the second flexible bag 104 maintain the required detection space shape and size of the photocatalytic screen during the experiment.

[0058] In this embodiment, the first inner cavity 101 (directly containing the photocatalytic screen) has a large cross-sectional area, resulting in a relatively slow gas velocity flowing through it. This helps ensure sufficient contact time between the gas and the photocatalytic screen, thereby improving the efficiency of the photocatalytic reaction. The second inner cavity 102, with its smaller cross-sectional area, allows for faster gas flow. This design utilizes the continuity equation in fluid dynamics, which states that in a closed system, fluid velocity is inversely proportional to the cross-sectional area of ​​the passage. The increased gas velocity in the second inner cavity 102 leads to a decrease in dynamic pressure in that area (according to Bernoulli's principle). This pressure drop results in a relatively high ambient pressure on the outer side of the second flexible bag 104, generating an outward suction force.

[0059] The design of the second inner cavity 102 not only regulates the gas flow rate but also utilizes the pressure difference to help maintain the structural stability of the second flexible bag 104. Because the dynamic pressure of the second inner cavity 102 is lower than the external environmental pressure, the resulting pressure difference causes the second flexible bag 104 to expand outwards. This helps maintain the integrity of the internal structure and ensures sufficient space around the photocatalytic screen for effective gas purification. By adjusting the cross-sectional area ratio of the first inner cavity 101 and the second inner cavity 102, the gas flow rate and pressure can be precisely controlled, thus providing optimal working conditions for the photocatalytic screen. Gas flowing slowly through the screen has more time to contact the active material on the screen surface, increasing the likelihood and efficiency of the reaction. This design allows for adaptation to different experimental needs, such as different flow rates, pressures, or screen types, by simply adjusting the relative sizes of the first flexible bag 103 and the second flexible bag 104, making the system highly flexible and adaptable.

[0060] In any of the above embodiments, the conductive component 4 passes through the first flexible bag 103 and the second flexible bag 104 respectively, and the conductive component 4 has a third inner cavity 401 that communicates with the first inner cavity 101. The conductive component 4 can directly guide the test gas in the first inner cavity 101 to the outside by bypassing the first flexible bag 103 and the second flexible bag 104 through the third inner cavity 401.

[0061] The illumination unit 2 is installed on the inner wall of the third inner cavity 401 near the first flexible bag 103 to block or open the first inner cavity 101. The illumination unit 2 is not only used for internal illumination of the first inner cavity 101, but also functions as a control valve to selectively export the test gas in the first inner cavity 101 to the outside, specifically to introduce it into the test container 5. The illumination unit 2 covers the connection between the test container 5 and the connecting component 4. The illumination unit 2 can be threadedly connected to the open third inner cavity 401 for easy screwing operation. The movement of the illumination unit 2 along the axis of the third inner cavity 401 realizes the connection or blockage between the third inner cavity 401 and the first inner cavity 101.

[0062] In this embodiment, the conductive component 4 is designed as an integrated structure, typically made of high-temperature and corrosion-resistant materials, such as stainless steel or special plastics, to ensure stability and durability in various environments. The third inner cavity 401 penetrates the first flexible bag 103 and the second flexible bag 104, directly receiving the test gas from the first inner cavity 101, providing a direct channel for the gas to the external environment or a specific collection system.

[0063] At the locations where the first flexible bag 103 and the second flexible bag 104 are penetrated, the conductive component 4 needs to have a good sealing design, typically using O-rings, sealant or other suitable sealing materials to prevent any gas leakage and the entry of external contaminants.

[0064] The third inner cavity 401 allows the test gas to be directly extracted from the first inner cavity 101. This design reduces the residence time of the gas in the multi-layered structure, thereby accelerating the testing cycle and improving experimental efficiency. It is suitable for situations requiring rapid determination of gas composition or chemical analysis, such as direct analysis of the test gas components using instruments like gas chromatography or mass spectrometry. By bypassing the first flexible bag 103 and the second flexible bag 104, the third inner cavity 401 prevents the test gas from mixing with gases from other parts, thus reducing the risk of cross-contamination. This is crucial for ensuring the accuracy and repeatability of test results. The control system can adjust the gas flow rate and pressure in the conductive component 4 to adapt to different testing requirements. For example, the gas flow rate and direction can be controlled by adjusting additional valves or using a pump. The third inner cavity 401 can be connected to an external sample collection device, such as a gas collection bag, or directly input into an analytical instrument for subsequent chemical or biological analysis.

[0065] The illumination unit 2 is installed at one end of the third inner cavity 401, close to the first flexible bag 103. It not only provides necessary illumination to support internal operation and observation but also functions as a control valve to regulate gas flow. The illumination unit 2 is threaded into the third inner cavity 401, a design that allows the user to open or close the gas flow by rotating the illumination unit 2, achieving precise flow control. The illumination unit 2 can move along the axis of the third inner cavity 401, thereby opening or closing the third inner cavity 401, and thus controlling whether the gas in the first inner cavity 101 can flow to the outside or to the detection container 5. The design may include seals or O-rings to ensure that gas does not leak when closed or sealed.

[0066] The user can adjust the gas flow direction as needed by rotating the illumination unit 2. When it is necessary to export gas from the first inner cavity 101 to the detection container 5 for analysis, the user can open the third inner cavity 401 by adjusting the illumination unit 2. This control method allows for rapid switching of gas flow states, facilitating multi-stage testing or rapid changes in experimental settings at different test stages. In addition to controlling gas flow, the illumination unit 2 also illuminates the interior of the first inner cavity 101, allowing the operator to clearly see the internal structure and the reactions occurring, which is crucial for experimental observation and data recording. The light source is likely an LED lamp due to its durability, long lifespan, and ability to provide sufficient illumination. When gas export is not required, the illumination unit 2 can completely seal the third inner cavity 401, ensuring no accidental gas leakage and improving the safety and reliability of the experiment. The key to the sealing design is preventing cross-contamination and maintaining the purity of the experimental environment.

[0067] Furthermore, the lighting unit 2 includes an LED 201 and a sealing post 202.

[0068] The LED bead 201 is electrically connected to an external source and is used to emit light into the photocatalytic screen inside the first inner cavity 101;

[0069] The sealing post 202 is screwed onto the inner wall of the conductive tube; the lamp bead 201 is installed at one end of the sealing post 202 near the first inner cavity 101, and a hollow hole is opened in the sealing post 202 for the conductive wire of the lamp bead 201 to pass through. The inner wall of the hollow hole and the conductive wire are sealed with glue.

[0070] Here, the LED bead 201 serves as a light source, connected to an external power supply to provide the required light intensity, particularly ultraviolet light, for activating photocatalytic materials such as titanium dioxide in the photocatalytic screen. The LED bead 201 is typically installed at the end of the conductive component 4, near the first inner cavity 101, to maximize direct light irradiation onto the photocatalytic screen. The sealing post 202 is designed with a threaded structure, allowing it to be screwed onto the inner wall of the conductive tube. This structure facilitates installation and maintenance while providing excellent sealing. The LED bead 201 is installed at the end of the sealing post 202 near the first inner cavity 101, a design that directly concentrates light onto the photocatalytic screen, improving light efficiency. A hollow hole is formed in the sealing post 202 to accommodate the conductive wire of the LED bead 201. This design allows for the connection of the wire from the external power supply to the LED bead 201 while maintaining the structural integrity of the sealing post 202. The inner wall of the hollow hole and the conductive wire are sealed with adhesive, a sealing method that not only prevents gas leakage but also protects the wire from chemical or physical damage.

[0071] As described above, LED 201 provides the necessary illumination, typically ultraviolet light, to activate the photocatalytic material of the photocatalytic screen, thereby effectively decomposing or altering pollutants in the gas passing through the screen. The position of LED 201 and the design of the sealing post 202 ensure that the illumination can directly and concentratedly target the photocatalytic screen, maximizing the efficiency of light energy utilization. The sealant prevents any gas from entering the interior of the sealing post 202, which is crucial for maintaining system pressure and preventing gas leakage. The seal also protects the conductive wires from environmental influences such as humidity, chemical corrosion, or physical damage, ensuring the long-term stable operation of the lighting system. The threaded connection of the sealing post 202 makes it easy to replace and maintain LED 201 and related components. When it is necessary to replace LED 201 or repair the wires, the sealing post 202 can be easily unscrewed for necessary operations.

[0072] Furthermore, the outlet pipe 402 and the guide pipe have a connection point, and the connection point between the sealing column 202 and the inner wall of the guide pipe is sealed. The side wall of the sealing column 202 near the lamp bead 201 has an annular groove 203 that communicates with the first inner cavity 101. When the sealing column 202 is rotated outward away from the first inner cavity 101, the annular groove 203 connects with the connection point between the outlet pipe 402 and the guide pipe, so as to realize the output of gas from the first inner cavity 101 to the detection container 5.

[0073] Here, the sealing post 202 is installed on the inner wall of the guide tube and fixed by screws. This design allows the sealing post 202 to rotate and move, thereby adjusting the opening and closing state of the internal channel. The twisting movement of the sealing post 202 can control the communication state with the gas outlet pipe 402, realizing the switching of gas flow direction. An annular groove 203 is formed on the side wall of the sealing post 202 near the lamp bead 201. This groove communicates with the gas outlet pipe 402 when the sealing post 202 is rotated to a specific position. The design of the annular groove 203 is precise enough to expose or cover the opening of the gas outlet pipe 402 when the sealing post 202 is twisted, thereby controlling whether gas can flow from the first inner cavity 101 to the detection container 5.

[0074] As described above, when gas needs to be output from the first inner cavity 101 to the detection container 5, the operator aligns the connection between the annular groove 203 and the outlet pipe 402 by screwing on the sealing post 202. This alignment allows the gas in the first inner cavity 101 to flow into the guide tube, enter the outlet pipe 402 through the annular groove 203, and finally be introduced into the detection container 5. When it is necessary to stop the gas flow or keep the gas in the first inner cavity 101, the sealing post 202 is screwed back to the position of closing the outlet pipe 402, physically blocking the gas output path. This design allows for very precise control of the gas flow direction and can quickly adjust the gas output state according to experimental needs. The operational flexibility is particularly important for multi-stage or multi-set experiments, allowing for adjustment of gas flow as needed at different stages. The design of the screw connection of the sealing post 202 and the annular groove 203 ensures that there is no gas leakage under any conditions, maintaining the safety and stability of the experimental environment. Glue sealing and other sealing measures help ensure that the entire system operates safely even under high pressure.

[0075] In any of the above embodiments, the operating conditions include operating brightness and operating airflow. These two factors can be used to determine the operating conditions of the photocatalytic screen in actual use, and to achieve the following:

[0076] In scenario one, the operating brightness of the photocatalytic screen is adapted by adjusting the number of lighting units 2 and / or the light intensity of the light-emitting end of a single lighting unit 2.

[0077] In the second scenario, by setting the distance between all the lighting units 2 and the photocatalytic screen, the volume of the first inner cavity 101 relative to the second inner cavity 102 is adjusted, and the operating airflow of the photocatalytic screen is adapted.

[0078] In this embodiment, the primary function of the lighting is to provide sufficient light energy to activate the photosensitive material (typically titanium dioxide) in the photocatalytic screen. These materials generate free radicals, such as hydroxyl radicals, when exposed to light. These free radicals possess strong oxidizing capabilities, capable of decomposing organic pollutants and killing microorganisms such as bacteria and viruses. Controlling the light intensity is crucial for maximizing photocatalytic efficiency. Insufficient light leads to a slower reaction rate, while excessive light can result in energy waste. The intensity of light illuminating the photocatalytic screen can be precisely controlled by adjusting the power output of the lighting unit 2 (e.g., LED beads 201) or by using a dimmable lighting system. The luminaire is typically connected to a system controller, which can preset the light intensity or automatically adjust it based on real-time monitoring data.

[0079] Controlling the airflow is crucial to ensure sufficient gas flow across the photocatalytic screen, maximizing the contact and decomposition of pollutants. Airflow regulation also affects system energy efficiency and reaction speed; excessive airflow may result in the emission of unreacted gas, while insufficient airflow can lead to prolonged reaction time and reduced efficiency. Airflow is controlled by adjusting the fan speed or using the regulating valve 302. These components are typically connected to the system's central control unit and can be adjusted manually or automatically as needed. Sensors (such as flow meters) can be used to monitor the actual amount of gas flowing through the screen, ensuring the set airflow is maintained during operation.

[0080] As described in Scenario 1, the total illumination is adjusted by increasing or decreasing the number of illumination units 2, depending on the specific needs of the photocatalytic screen and the reaction conditions. This is particularly important for different types of chemical reactions or photocatalytic systems of varying scales, as each reaction and system may require different intensities of light to achieve optimal results. The light intensity of a single illumination unit 2 can be controlled by changing the output power of the power supply or adjusting the driving current of the LED beads 201. This flexibility allows for fine-tuning of the operating environment, ensuring uniform and sufficient illumination of every part of the photocatalytic screen.

[0081] Illumination section 2 typically uses LED chips 201 because LEDs offer advantages such as easily controllable light intensity, high energy efficiency, and long lifespan. The light intensity of the LEDs can be adjusted by changing the supply voltage or current, usually via an electronic driver that can be programmable or manually adjusted. The system can be configured with a light sensor to monitor the light intensity in real time and automatically adjust the LED output via a feedback loop to maintain a constant light intensity. Using multiple illumination sections 2 in a system can improve the coverage and uniformity of the illumination. The system controller can control each illumination section 2 independently or group them together to meet the lighting needs of a specific area or the entire system. In practice, the control system may include a user interface that allows the operator to select the appropriate lighting configuration and light intensity settings based on experimental requirements or system performance feedback. By adjusting the number of illumination sections 2 and the light intensity, the system can adapt to different needs, from small-scale laboratory research to large-scale industrial applications. This adaptability is crucial for achieving different photocatalytic efficiencies and treating different types of pollutants.

[0082] Regarding the description of scenario two, changing the distance between the illumination unit 2 and the photocatalytic screen directly adjusts the volume of the first inner cavity 101. Increasing the distance increases the inner cavity volume, thereby reducing the gas flow rate and increasing the gas-screen contact time. Conversely, decreasing this distance decreases the inner cavity volume, increases the gas flow rate, and reduces the contact time. By precisely controlling the gas flow rate, the screen performance can be optimized according to different photocatalytic requirements. For photocatalytic reactions requiring longer contact times, increasing the volume and decreasing the flow rate may be more advantageous. For scenarios requiring rapid processing, decreasing the volume and increasing the flow rate may be more effective.

[0083] The illumination unit 2 can be positioned using mechanical adjustment devices (such as guide rail systems, screw adjustment mechanisms, or telescopic arms). These systems allow the illumination unit 2 to move closer to or further away from the photocatalytic screen along a defined axis while maintaining stability. This adjustment can be manual or automatic, depending on the system design and operational requirements. Automatic systems may include stepper motors or servo motors that receive commands from a controller and move precisely. Changing the volume of the first inner cavity 101 directly affects the gas's dynamic properties. According to the ideal gas law, changes in volume affect the gas's pressure and temperature, thus influencing the conditions for the photocatalytic reaction. The system can be configured with flow controllers and pressure sensors to monitor and adjust the airflow conditions after volume changes, ensuring that operating conditions are always optimal. The control system can integrate sensor data (such as position sensors, pressure and flow sensors) to automatically adjust the position of the illumination unit 2, thereby optimizing the working environment of the photocatalytic screen. Automated control can be based on real-time data feedback, ensuring rapid system response and maintaining the set optimal operating conditions at all times.

[0084] In any of the above embodiments, the conductive component 4 is rigid and acts as a fixed fulcrum in fixing the first flexible bag 103 and the second flexible bag 104 made of flexible material. The end of the lighting part 2 away from the first flexible bag 103 is fixedly connected to the rod body 403, which can be connected to an external universal joint for support and fixation at different angles. All the conductive components 4 and the connected lighting part 2 and rod body 403 constitute a bracket for supporting the first flexible bag 103.

[0085] In this embodiment, the conductive component 4, acting as a rigid structural element, is connected to the first flexible bag 103 and the second flexible bag 104, both made of flexible material, providing a stable fixing point to prevent excessive movement or deformation of the flexible bags under gas flow or external forces. This stable support structure is particularly important for maintaining the photocatalytic screen in a specific position and shape to ensure uniform and effective light and gas flow. The rod 403 is connected to an external universal joint, allowing the entire support structure to be adjusted at multiple angles. This design improves the system's flexibility, allowing users to adjust the position and orientation of the first flexible bag 103 according to experimental setup or operating space requirements. The use of the universal joint allows the support structure to adapt to different installation conditions and operational needs, providing a wide range of motion and adjustment possibilities.

[0086] The combination of the rigid conductive component 4 and the flexible bag utilizes the stability of the rigid component to compensate for potential structural weaknesses of the flexible bag, such as susceptibility to deformation and vibration. This design reduces potential operational problems, such as gas leakage or insufficient screen exposure. This combination also helps maintain the overall aerodynamic characteristics of the system, ensuring optimized gas flow path design and reducing energy loss. The rod 403, connected via a universal joint, provides dynamic support for the first flexible bag 103, allowing the user to adjust the bag's position as needed to best utilize the workspace or achieve optimal photocatalytic efficiency. The rod 403 is typically designed from lightweight, high-strength materials, such as carbon fiber or advanced alloys, ensuring necessary support without excessively increasing the system's weight. The design considers ease of operation and safety, enabling complex spatial configuration adjustments through simple mechanical operations. This is particularly important for experimental environments requiring frequent changes to experimental setups or maintenance checks.

[0087] In any of the above embodiments, the first flexible bag 103 and the second flexible bag 104 are respectively provided with two gas mixing ports 105 that connect to the air supply channel. The gas mixing port 105 on the same side can be used to distribute the air intake of the first inner cavity 101 and the second inner cavity 102 and to summarize the air output. Along the flow direction of the test gas in the first inner cavity 101, all the test containers 5 are located between the photocatalytic screen and the gas mixing port 105 for outputting the test gas. The test containers 5 are set behind the photocatalytic screen along the flow direction of the test gas. When the test containers 5 absorb the test gas, they are all the part that flows through the photocatalytic screen in the current cycle.

[0088] In this embodiment, the first flexible bag 103 and the second flexible bag 104 each have a mixing port 105 connecting to the air supply channel. These mixing ports 105 are located on the same side, allowing for precise distribution of the amount of gas entering the first inner cavity 101 and the second inner cavity 102. The mixing port 105 also summarizes the gas output from the two inner cavities, achieving uniform gas distribution and effective recovery, thereby optimizing the overall gas flow and reaction efficiency. All detection containers 5 are positioned between the photocatalytic screen and the mixing port 105, along the direction of gas flow. This layout ensures that the gas sample in the detection container 5 is obtained directly from the photocatalytic screen after processing, without the risk of recirculation or mixing. By placing the detection container 5 in this position, the gas after the photocatalytic reaction can be captured, allowing for direct analysis of the processing effect.

[0089] The design of the mixing port 105 allows the operator to adjust the amount of gas distributed to the first inner chamber 101 and the second inner chamber 102, optimizing the gas flow rate according to the needs of the photocatalytic screen and reaction conditions. This is crucial for controlling the efficiency and speed of the photocatalytic reaction. By controlling the gas supply to each inner chamber, the system can maintain the required reaction environment while ensuring that the photocatalytic screen comes into contact with sufficient gas for effective pollutant decomposition. The detection container 5, positioned behind the photocatalytic screen, ensures that the collected gas samples are fresh, i.e., just passed through and processed by the photocatalytic screen. This layout facilitates obtaining the most direct treatment results and evaluating the purification effect of the photocatalytic screen. The detection container 5 can be used for rapid analysis of pollutant concentrations in the gas, for example, by quickly displaying post-reaction chemical changes using pre-loaded test strips. The gas utilization efficiency and reaction conditions can be further optimized by monitoring and adjusting the operation of the mixing port 105 through an intelligent control system. This includes adjusting parameters such as gas flow rate, pressure, and temperature to achieve the best photocatalytic effect. Automated control can adjust parameters based on real-time feedback to adapt to constantly changing operational needs or environmental conditions.

[0090] In any of the above embodiments, if the distance between the two gas mixing ports 105 of the first flexible bag 103 is a, and the flow velocity of the test gas at the current moment is b, then the operation time t is obtained using the following formula:

[0091]

[0092] Where k is the change in the virus content per unit volume of the test gas, and each detection container 5 is used to obtain the virus content per unit volume of the test gas at different times, and to calculate the change in the amount of virus eliminated by using the virus content per unit volume of the test gas at different times.

[0093] In this embodiment, the distance *a* between the two mixing ports 105 and the gas flow rate *b* are the fundamental parameters for calculating the time required for the gas to pass through the screen. The ratio of distance to velocity determines the time required for the gas to travel from one port to another, reflecting the length of contact time between the gas and the screen. By collecting gas samples at different time points, each detection container 5 can obtain the virus content of the test gas at a specific moment. By comparing these data, the change *k* in virus content can be calculated, reflecting the disinfection effect of the photocatalytic screen. The position of the detection container 5 (set after the photocatalytic screen) ensures that the collected gas has come into contact with the screen, ensuring the relevance and accuracy of the data. The real-time monitoring system can continuously track changes in gas flow rate, virus content, and other relevant parameters, such as temperature and pressure, which are important bases for adjusting the working conditions of the photocatalytic screen. The data analysis system can automatically adjust the working parameters of the screen based on real-time feedback, such as increasing the lighting intensity or adjusting the gas flow rate, to optimize the purification effect.

[0094] In any of the above embodiments, the two sets of branch channels 301 can move relative to each other to adjust the distance between the two gas mixing ports 105 of the first flexible bag 103, so as to extend or shorten the length of the first inner cavity 101 or the second inner cavity 102, thereby changing the time for the test gas to be sterilized.

[0095] In this embodiment, by moving the two sets of branch channels 301 relative to each other, the system can adjust the distance between the two mixing ports 105 inside the first flexible bag 103, thereby changing the total length of the first inner cavity 101 or the second inner cavity 102. This adjustment directly affects the path length of the gas through the photocatalytic screen, thus changing the contact time between the gas and the screen. Extending the inner cavity length increases the gas residence time, which is suitable for applications requiring a longer photocatalytic reaction time to achieve higher disinfection efficiency. Conversely, shortening the inner cavity length reduces the residence time, which is suitable for applications requiring rapid processing.

[0096] The branch channel 301 may be operated via mechanical adjustment devices, such as using a slide rail system, screw rod, or hydraulic / pneumatic cylinder to achieve precise position adjustment. These devices allow the branch channel 301 to move smoothly along a predetermined trajectory, ensuring the continuity and stability of operation. Changing the inner cavity length affects the gas flow rate and pressure. Increasing the length may lead to a decrease in flow rate and an increase in pressure, while decreasing the length may lead to an increase in flow rate and a decrease in pressure. The system needs to monitor these parameters to ensure that the photocatalytic reaction proceeds under optimal conditions. The control system can automatically adjust the position of the branch channel 301 according to preset processing requirements. This is typically achieved through integration with sensors (such as flow meters and pressure sensors) and control software, which automatically adjusts operating parameters based on real-time data. The system may include a feedback mechanism to dynamically adjust the inner cavity length based on the actual performance of the photocatalytic screen (such as disinfection efficiency) and environmental conditions (such as gas composition and humidity). This adaptive adjustment helps the system maintain optimal operating conditions under different circumstances.

[0097] In any of the above embodiments, the air supply channel includes two sets of branch channels 301, each set of branch channels 301 being connected to the mixing port 105 of the first flexible bag 103 and the second flexible bag 104 respectively; a set of branch channels 301 is provided with a damper 302 that controls the first inner cavity 101 and the second inner cavity 102 respectively, and the damper 302 can be used to forcibly distribute the air intake of the first inner cavity 101 and the second inner cavity 102, for example, completely shutting off the gas flow of the first inner cavity 101 or the second inner cavity 102.

[0098] In this embodiment, the damper 302 on each branch channel 301 allows the operator to independently control the amount of gas flowing into the first inner cavity 101 and the second inner cavity 102. This means that the gas flow in each inner cavity can be adjusted according to the specific needs of the photocatalytic screen, optimizing processing efficiency and effect. The design of the damper 302 allows for precise adjustment of airflow, including completely shutting off the gas flow in a particular inner cavity. This capability is particularly important as it prevents gas from entering a particular inner cavity when maintenance, testing, or operation under specific conditions is required.

[0099] The air valve 302 is typically a mechanically or electronically controlled device that regulates the flow rate of gas through a pipeline. These valves can be butterfly valves, ball valves, or slide valves, providing varying degrees of sealing and flow regulation as needed. In automated systems, the operation of the air valve 302 may be connected to sensors (such as pressure sensors and flow meters) and a central control system to adjust the airflow in real time to meet preset operating conditions. By independently controlling the air valve 302 in each chamber, the system can precisely distribute gas according to different operational requirements. For example, when centralized processing of air in the first chamber 101 is required, the air valve 302 guiding to the second chamber 102 can be closed, ensuring that all available gas passes through the photocatalytic screen. This control mechanism allows the system to use gas more efficiently, reduce waste, and ensure optimal air contact and reaction time in photocatalytic treatment. The branch channels 301 configured with the air valves 302 provide fine control of the system, enabling it to adapt to different operating conditions and application requirements. This not only improves system efficiency but also increases its applicability in various environments.

[0100] Furthermore, the air supply unit 3 also includes an air pump 303 and an annular air guide shell 304.

[0101] The air pump 303 is mounted on the base 7; an impeller 305 is installed at the output end of the air pump 303.

[0102] The annular air guide shell 304 is installed on the air pump 303, and the impeller 305 is located inside the annular air guide shell 304 and is driven to rotate by the air pump 303; the annular air guide shell 304 is connected to the branch channel 301 and the air inlet 6 respectively.

[0103] Here, the air pump 303, as the core of the air supply system, provides the necessary power to propel the gas through the system. This includes drawing in air from the external environment and delivering it into the air supply channel, ultimately reaching the photocatalytic screen. An impeller 305 is mounted at the output end of the air pump 303. Driven by the air pump 303, the impeller 305 rotates, enhancing the airflow by increasing the kinetic energy of the gas. This allows the gas to be efficiently transported through the pipeline system. An annular air guide shell 304 is mounted around the impeller 305, and its main function is to effectively guide the airflow generated by the impeller 305 to the connected branch channel 301 and the air inlet 6, ensuring uniform airflow distribution and reducing energy loss.

[0104] As described above, the air pump 303 is typically driven by an electric motor, which is connected to the impeller 305 via a rotating shaft. When the motor starts, the impeller 305 begins to rotate, thereby drawing in and propelling air. The design of the air pump 303 usually takes into account the required pressure and flow rate to meet the specific needs of the system. The impeller 305 is a common gas-driven device, designed with multiple fan-shaped blades arranged around a central axis. When the impeller 305 rotates, the blades throw the gas outward through centrifugal force, thereby generating a high-speed airflow. This process simultaneously reduces the gas pressure and increases its velocity. The annular air guide shell 304 is structurally designed to smoothly guide the airflow generated by the impeller 305 to the desired location, such as the branch channel 301 or directly to the photocatalytic screen. This design reduces the resistance and turbulence that the airflow may encounter during its movement, improving the utilization efficiency of the airflow and the overall energy efficiency of the system. The design and integration of the entire air supply section 3 takes into account the aerodynamic efficiency and ease of operation of the system. The combined use of the air pump 303, impeller 305 and annular air guide shell 304 not only needs to meet the technical parameter requirements, but also needs to ensure the convenience of operation and maintenance.

[0105] Specifically, the air supply duct also includes a return air duct 306, which is connected to the mixing port and air inlet 6 of the first flexible bag 103 and the second flexible bag 104 respectively; both the return air duct 306 and the branch duct 301 are formed by flexible pipes.

[0106] As described above, the main function of the return air duct 306 is to recirculate the treated gas from the mixing port 105 of the first flexible bag 103 and the second flexible bag 104 back to the inlet 6. This method of gas recycling increases gas utilization efficiency, especially in confined environments (such as enclosed spaces or locations with strict environmental requirements). The branch channel 301 is responsible for delivering fresh or external gas to the first and second flexible bags 104, while the return air duct 306 recirculates the treated gas in these bags back to the system inlet. This design allows for adjustment and optimization of the gas flow path, ensuring that all gas fully contacts the photocatalytic screen.

[0107] The use of flexible ducts allows for greater flexibility in spatial arrangement, adaptable to the actual installation environment and requirements. Flexible ducts also reduce installation complexity and potential gas flow resistance. They can adapt to various movements and shape changes, making them particularly suitable for dynamically changing working environments or situations requiring frequent duct repositioning. The return air duct 306 reduces the demand for fresh air by reintroducing treated gas into the system, thus saving energy and lowering operating costs. This circulation method is particularly suitable for systems requiring long-term continuous operation. During photocatalytic treatment, ensuring all gas passes through the screen multiple times increases treatment efficiency, especially with large processing capacities or high pollutant concentrations. The return air system design significantly reduces the system's dependence on external air, alleviating environmental pressure while also lowering energy consumption and operating costs. The use of flexible ducts also helps reduce installation and maintenance costs, as they are easy to install and replace, and also reduce potential mechanical damage caused by duct rigidity.

[0108] In any of the above embodiments, the air intake 6 includes an air intake pipe 602 and a tapered pipe 601.

[0109] Two tapered tubes 601 are provided and installed at the two ends of the air intake pipe 602 respectively; one of the tapered tubes 601 is fixedly connected to the annular air guide shell 304 and communicates with the inner cavity of the annular air guide shell 304.

[0110] The test gas inlet cylinder 603 and the inlet pipe 602 are respectively connected to the test gas inlet cylinder 603 and the return air channel 306.

[0111] In this embodiment, the inlet pipe 602 is the main conduit connecting the test gas inlet cylinder 603 and the system interior (including the return air channel 306), responsible for delivering fresh test gas or recirculated gas into the system. A tapered pipe 601 is located at both ends of the inlet pipe 602; one end is connected to the test gas inlet cylinder 603, and the other end is fixedly connected to the annular air guide shell 304 and communicates with the inner cavity of the annular air guide shell 304. The design of the tapered pipe 601 helps to smooth the gas flow, reduce turbulence during flow, and improve airflow stability. The function of the annular air guide shell 304 is to evenly distribute the gas from the inlet pipe 602 into the system interior, ensuring the efficiency and uniformity of gas flow.

[0112] Test gas is delivered from the inlet cylinder through the inlet pipe 602 and enters the annular air guide shell 304 through the conical pipe 601. The design of the conical pipe 601 ensures that the gas velocity and pressure are properly regulated before entering the air guide shell, reducing potential impact and turbulence upon entry. The annular air guide shell 304 is internally designed to uniformly guide the gas to the connected branch channels 301, thereby achieving uniform gas distribution in the first flexible bag 103 and the second flexible bag 104. The inlet pipe 602 is connected not only to the inlet cylinder but also to the return air channel 306, allowing the gas in the system to be recycled. This design allows for adjustment of the ratio of fresh gas to recycled gas as needed, optimizing energy efficiency and reducing operating costs. The double-ended design of the conical pipe 601 also facilitates the delivery and management of gas from two different sources (fresh gas and recycled gas). The entire intake system is designed with aerodynamic efficiency in mind, ensuring minimal energy loss during gas flow within the system. The combined use of the conical tube 601 and the annular air guide shell 304 effectively controls the gas flow rate and direction, reducing the overall resistance of the system.

[0113] In any of the above embodiments, the performance testing apparatus further includes:

[0114] The support frame 8 is slidably mounted on the base 7 and is fixedly connected to a set of branch channels 301 that are responsible for connecting the test gas outlets of the first inner cavity 101 and the second inner cavity 102. Specifically, the top of the support frame 8 is fixedly connected to the flexible tube that forms the set of branch channels 301 so as to drive the two mixing outlets of the first inner cavity 101 to move away from or closer to each other.

[0115] In this embodiment, the support frame 8 is slidably mounted on the base 7, providing a stable platform that allows the branch channel 301 connected to it to move along a preset path. This design allows the system to adjust the spatial configuration of the first inner cavity 101 as needed. The top of the support frame 8 is fixedly connected to the flexible tube constituting the branch channel 301, a configuration that allows the movement of the support frame 8 to directly affect the position of the branch channel 301 connecting to the mixing port of the first inner cavity 101. By controlling the position of the support frame 8, the distance between the two mixing ports of the first inner cavity 101 can be adjusted, thereby adjusting the length of the inner cavity. By adjusting the length of the first inner cavity 101, the residence time and flow rate of the test gas in the inner cavity can be controlled, thus affecting the gas treatment efficiency and effect of the photocatalytic screen.

[0116] The support frame 8 is mounted on the base 7 via a slide rail or similar mechanism, allowing for smooth movement along a defined axis. This sliding can be manually controlled or electrically driven, depending on the system design and operational requirements. Because the branch channels 301 are constructed using flexible tubing, these channels adapt to changes in shape and length as the support frame 8 moves, maintaining the continuity and sealing of the gas passage. The material selection of the flexible tubing ensures that it will not break or wear excessively during mechanical movement. In more advanced systems, the movement of the support frame 8 can be performed through an automated control system that adjusts the position of the support frame 8 based on sensor inputs such as gas flow rate, pressure, and feedback on treatment effectiveness. This automation ensures precise system adjustment and efficient operation. The design and operation of the support frame 8 are intended to optimize the operating conditions of the photocatalytic screen, improving treatment effectiveness by adjusting gas flow characteristics such as residence time and flow rate, and adapting to different operational needs.

[0117] Specifically, each set of branch pipes consists of two sub-channels, which are interconnected to connect to the interlocking mixing inlets on one side.

[0118] As described above, by designing the two sub-channels to be interlocked, the system allows for easy adjustment of the pipe length and direction as needed. This design enables rapid adjustment of the gas flow path to adapt to different test conditions or operational requirements. The interlocking sub-channels precisely control the gas distribution from one mixing port to another, ensuring uniform gas distribution in the first inner cavity 101 and the second inner cavity 102. This is crucial for ensuring uniform gas contact on the photocatalytic screen. The interlocking design of the sub-channels not only improves the system's adjustability but also facilitates maintenance and replacement. When cleaning or replacing pipe sections is required, the sub-channels can be easily separated for operation.

[0119] The sub-channels are connected via a mechanical coupling system, such as using snap rings, grooves, or spiral joints. This connection method ensures a tight seal and structural strength at the interface, preventing gas leakage. The depth and tightening method of the connection can be adjusted according to gas pressure and flow rate requirements, ensuring reliability and safety under various operating conditions. The sub-channel's connection design allows operators to adjust the length or direction of the pipes as needed, thereby altering the gas flow path or speed. This adjustment can be done manually or through an automatic control system. During system operation, the sub-channel configuration can be dynamically adjusted based on the efficiency of the photocatalytic screen or other monitoring parameters (such as gas analysis results). The sub-channel design needs to be tightly integrated with other parts of the entire supply and return air system (such as the air pump 303, air valve 302, etc.) to ensure efficient and uniform gas flow throughout the system. The control system can integrate sensor data (such as position sensors, pressure and flow sensors) to automatically adjust the position and configuration of the sub-channels based on real-time feedback.

[0120] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0121] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A performance testing device for virus elimination based on nano-titanium dioxide photocatalytic sieve, characterized in that, include: The airbag has a first cavity and a second cavity; The second inner cavity is isolated from the first inner cavity, and the second inner cavity is circumferentially disposed outside the first inner cavity; the photocatalytic screen is installed inside the first inner cavity; An illumination unit is installed on the airbag, and the light-emitting end of the illumination unit penetrates through the second inner cavity and extends into the interior of the first inner cavity; the first inner cavity cooperates with the illumination unit to adapt to the working conditions of the photocatalytic screen; The air supply unit has an air supply channel; the first inner cavity, the second inner cavity, and the air supply channel together form a circulating air path, which is used to allow the internal test gas to circulate through the photocatalytic screen, so as to obtain the working time of the photocatalytic screen in processing the test gas under the working conditions, and the working time is used to characterize the performance of the photocatalytic screen.

2. The performance testing device according to claim 1, characterized in that, The airbag includes: A first flexible bag, the inner wall of which forms the first inner cavity; A second flexible bag is fitted over the outside of the first flexible bag; the inner wall of the second flexible bag and the outer wall of the first flexible bag form the second inner cavity; The first flexible bag and the second flexible bag are connected by multiple conductive components. The first inner cavity is connected to the detection container through the conductive components. The detection container is used to obtain the virus content per unit volume of the test gas at the current moment.

3. The performance testing device according to claim 2, characterized in that, Along the flow direction of the test gas in the first inner cavity, the cross-sectional area of ​​the second inner cavity is smaller than that of the first inner cavity.

4. The performance testing device according to claim 2, characterized in that, The conductive component penetrates the first flexible bag and the second flexible bag respectively, and the conductive component has a third inner cavity that communicates with the first inner cavity; The lighting unit is installed on the inner wall of the third inner cavity near the first flexible bag to block or open the first inner cavity; the lighting unit covers the connection between the detection container and the opening component.

5. The performance testing device according to claim 2, characterized in that, The operating conditions include operating brightness and operating air volume, and include the following situations: Scenario 1: The operating brightness of the photocatalytic screen is adapted by adjusting the number of the lighting units and / or the light intensity of the light-emitting end of a single lighting unit; In scenario two, by setting the distance between all the lighting units and the photocatalytic screen, the volume of the first inner cavity relative to the second inner cavity is adjusted, and the operating airflow of the photocatalytic screen is adapted.

6. The performance testing apparatus according to claim 2, characterized in that, The conductive component is rigid, and the end of the lighting part away from the first flexible bag is fixedly connected to the rod; all the conductive components and the connected lighting part and the rod constitute a bracket for supporting the first flexible bag.

7. The performance testing apparatus according to claim 2, characterized in that, The first flexible bag and the second flexible bag each have two gas mixing ports that connect to the air supply channel; along the flow direction of the test gas in the first inner cavity, all the test containers are located between the photocatalytic screen and the gas mixing port for outputting the test gas.

8. The performance testing apparatus according to claim 7, characterized in that, If the distance between the two gas mixing ports of the first flexible bag is 'a', and the flow velocity of the test gas at the current moment is 'b', then the operation time 't' is obtained using the following formula: Wherein, k is the change in the viral content per unit volume of the test gas, and each of the detection containers is used to obtain the viral content per unit volume of the test gas at different times.

9. The performance testing apparatus according to claim 8, characterized in that, The air supply channel includes two sets of branch channels, each set of branch channels being connected to the mixing port of the first flexible bag and the second flexible bag respectively; and air valves are provided on one set of branch channels to control the first inner cavity and the second inner cavity respectively.

10. The performance testing apparatus according to claim 9, characterized in that, The two sets of branch channels can move relative to each other to adjust the distance between the two mixing ports of the first flexible bag.

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