Experimental system and method for detecting air filter

Abstract

The invention relates to the technical field of air filters, in particular to an experimental system and method for detecting an air filter. The system comprises a support frame used for keeping the stability of the experiment system; the test chamber adopts a vertical test channel pipeline, the top and the bottom of the test chamber are respectively provided with a cylinder used for assembling and disassembling an air filter and an absolute filter, and the downstream of the test chamber is provided with double gas sampling ports which are used for separately sampling particulate matter and gas filtering performance tests; the fan subsystem is arranged above the test chamber and is used for simulating air flow under a working condition; the sensor module is used for monitoring various parameters in the testing process in real time; and the data acquisition and processing sub-module is used for receiving the data of the sensor module, analyzing and processing the data and generating a test report. According to the technical scheme, the detection precision can be improved, the test process is simplified, and the filter performance is comprehensively evaluated.

Description

Technical Field

[0001] The invention relates to the technical field of air filters, and in particular to an experimental system and method for detecting air filters. Background Art

[0002] With the rapid development of global industrialization and urbanization, the road air environment is becoming increasingly complex, and various pollutants in the air have a serious impact on the operation of automobile engines. As a vital component in the intake system of automobile engines, the main function of the air filter is to remove particulate impurities in the air inhaled by the engine to protect the engine from damage and ensure that the engine can operate efficiently and stably. At the same time, hydrogen fuel cell electric vehicles are also appearing on the road. The air filter of the vehicle has gradually developed standard specifications for the filtering performance of harmful gases (such as sulfur dioxide, formaldehyde, etc.). The demand for gas filtering performance testing of air filters for hydrogen energy vehicles will also appear in the future. Therefore, the performance of the air filter is directly related to its use effect and life, and it is particularly important to accurately and comprehensively test the air filter.

[0003] However, there are many problems and defects in the air filter detection equipment and methods currently on the market, which limit the detection accuracy and efficiency. Specifically, most existing detection equipment adopts a horizontal structure design, which leads to a complex air flow path. When conducting dust filtration performance tests, it may cause deposition, and the airflow is prone to uneven dust when passing through the equipment, which seriously affects the accuracy of the test results. In addition, the sensors used in some equipment are not accurate enough to accurately measure various parameters, further exacerbating the errors in the measurement data.

[0004] In terms of the test process, existing equipment usually requires manual adjustment of multiple parameters, such as air flow, which is not only cumbersome to operate but also prone to errors. At the same time, the test process requires frequent filter replacement and recalibration of the equipment, which undoubtedly increases the difficulty and workload of the operation and reduces the test efficiency.

[0005] More importantly, most existing testing equipment can only test one or several properties of the filter, such as filtration efficiency, resistance, etc., but cannot fully evaluate the comprehensive performance of the filter under different working conditions. For example, most filter test benches can only perform particle tests or separate gas tests on air filters, which cannot meet the needs of comprehensive measurement of filters. This limitation leads to an incomplete evaluation of filter performance and it is difficult to accurately reflect its performance in actual applications.

[0006] In addition, the maintenance of existing equipment is also difficult. Due to the complex and diverse structure of the equipment, the connection and matching accuracy between components are required to be high. Once a failure occurs, the maintenance cost is high and time-consuming. At the same time, during the use of the horizontal structure detection equipment, the test dust is easy to accumulate under the airflow duct, and the cleaning and maintenance work is very difficult, which not only affects the service life and detection accuracy of the equipment, but also increases the maintenance cost. Summary of the invention

[0007] The purpose of the present invention is to provide an experimental system and method for detecting an air filter, which can improve detection accuracy, simplify the test process, and comprehensively evaluate the filter performance.

[0008] To achieve the above-mentioned objectives, in the first aspect, an embodiment of the present disclosure provides an experimental system for detecting air filters, including: a support frame for maintaining the stability of the experimental system; a test chamber, which adopts a vertical double test channel pipeline, and a pneumatic cylinder is respectively arranged at the top and the bottom for loading and unloading air filters and absolute filters, and a dual gas sampling port is arranged downstream of the test chamber for separately sampling particulate matter and gas filtration performance tests; a fan subsystem, which is installed above the test chamber, for simulating air flow under working conditions; a sensor module, which is used to monitor various parameters in the test process in real time; a data acquisition and processing submodule, which is used to receive data from the sensor module, analyze and process it, and generate a test report.

[0009] Beneficial effects of the basic solution: This application adopts a vertical layout, occupies a small space, is easy to install and maintain, and effectively solves the problems of complex airflow paths and uneven airflow in existing horizontal structure equipment. The dual gas sampling ports sample particulate matter and gas filtration performance respectively, allowing the system to comprehensively evaluate the performance of the air filter and meet diverse testing needs.

[0010] The support frame can ensure the stability of the experimental system under the vertical layout and reduce the test errors caused by vibration or shaking. The setting of the cylinder not only facilitates the loading and unloading of the air filter and absolute filter, but also ensures the stability during the test and improves the reliability of the test.

[0011] The fan subsystem is installed above the test chamber, which can simulate the air flow of the test piece under different working conditions, making the test results closer to the actual application scenario. This helps to more accurately evaluate the performance of the air filter in actual use.

[0012] The introduction of the sensor module enables real-time monitoring of various parameters during the test, including but not limited to temperature, humidity, pressure, flow, etc., making the test evaluation more comprehensive. The data acquisition and processing submodule is responsible for receiving these data, analyzing and processing them, and finally generating a test report, which improves the degree of automation and intelligence, not only increases the test accuracy, but also simplifies the test process and reduces manual intervention and errors.

[0013] This technical solution facilitates adjustment of the stroke and speed of the cylinder as needed to accommodate air filters of different sizes and weights; the sensor module and the data acquisition and processing submodule can also be upgraded and expanded to meet different testing requirements.

[0014] As an implementable preferred solution, the support frame is welded with steel and subjected to anti-corrosion treatment.

[0015] As an implementable preferred solution, the fan subsystem uses two high static pressure centrifugal fans, combined with two sets of vertical structure test pipeline systems. It can call a single fan for small air volume testing or call two fans for large air volume testing. It is also equipped with a frequency converter and a variable frequency drive for air volume control.

[0016] As an implementable preferred solution, the sensors include a pressure sensor, a temperature sensor, a humidity sensor and a flow meter, which are used to feedback the pressure, temperature, humidity and air volume of the system.

[0017] As an implementable preferred solution, the gas sampling port is connected to a gas sampling analyzer and a particle counter through a pipeline to complete the filtration performance test of the air filter on polluted air.

[0018] As an implementable preferred solution, a connection clamp and a clamp are provided in the test chamber to meet the requirements of loading and unloading different air filters and absolute filters.

[0019] As an implementable preferred solution, a compressed air pipeline is also provided in the test chamber, and the compressed air pipeline is connected to a compressed air source to provide air pressure power to the pneumatic cylinder, so that it can move up and down to facilitate the installation of different types of air filters or absolute filters.

[0020] As an implementable preferred solution, the data acquisition and processing subsystem can automatically collect air volume data and draw real-time curves. Combined with the control of the fan and the electric regulating valve on the pipeline, the performance curve of time and air volume during the test can be obtained.

[0021] As an implementable preferred solution, the data acquisition and processing subsystem also includes a differential pressure sensor installed at the front and rear positions of the test platform to measure the pressure changes of the test sample during the test. The data acquisition and processing subsystem also includes a differential pressure sensor installed at the front and rear positions of the test platform to measure the pressure changes of the test sample during the test; the differential pressure sensor can collect the pressure data of the test sample in real time, and through data analysis, generate a performance curve of pressure difference and flow under different air volume conditions.

[0022] In a second aspect, an embodiment of the present disclosure further provides an experimental method for detecting an air filter, which utilizes the above-mentioned experimental system for detecting an air filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the architecture of an experimental system for testing air filters.

[0024] Figure 2 The figure is a schematic diagram of the structure of an experimental system for testing air filters. DETAILED DESCRIPTION

[0025] In order to make the technical solution and advantages of the present application clearer, the technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings. It will be understood that the specific embodiments described herein are only partial embodiments of the present invention, which are only used to explain the present application, rather than to limit the present application. It should be noted that the technical features or combinations of technical features described in the following embodiments should not be considered isolated, and they can be combined with each other to achieve better technical effects. The same reference numerals appearing in the drawings of the following embodiments represent the same features or components, which can be applied to different embodiments.

[0026] In addition, unless otherwise defined, the technical terms or scientific terms used in the description of the present invention should have the common meanings understood by those skilled in the art in the art to which the present invention belongs.

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings: Reference Figure 1 ,An experimental system for testing an air filter includes a support frame, a test chamber, a fan subsystem, a sensor module, and a data acquisition and processing subsystem.

[0028] The support frame is used to provide a stable and safe working platform for the experiment. It is strong and durable, and can bear the weight of each part of the laboratory table and the vibration generated during operation. Steel is preferably used for welding, and the surface is treated with anti-corrosion, such as spraying anti-corrosion paint, to ensure long-term stability and safety.

[0029] The test chamber structure is a vertical double test channel pipeline, refer to Figure 2 The vertical layout effectively solves the problems of complex airflow paths and uneven airflow in existing horizontal structure equipment. A pneumatic cylinder is set at the top and bottom of the test chamber for safe and efficient loading and unloading of air filters (or air filter assemblies) and absolute filters. The layout of the pneumatic cylinder should ensure that it matches the size, weight and loading and unloading paths of the air filters and absolute filters. The dual gas sampling ports downstream can complete the filtration performance test sampling of particulate matter and gas respectively. Figure 2 , double test pipeline design, large and small air volume pipelines basically meet the test air volume requirements of different air filters, enhancing the applicability and flexibility of the test bench.

[0030] The downstream gas sampling port can be connected to a high-precision gas sampling analyzer and a particle counter through a pipeline to complete the air filter's filtration performance test for harmful gases and dust (or aerosols), so that the test system can meet the requirements for particle and gas filtration performance testing, and then comprehensively evaluate the performance of the air filter.

[0031] Through the pneumatic cylinder installed with pneumatic control and the compressed air pipeline, connection fixtures, clamps and other equipment, the requirements for loading and unloading different air filters and absolute filters can be met. Through the control of the pneumatic cylinder air supply valve on the centralized control knob plate near the test bench, it can be moved up and down to disassemble and assemble the absolute filter that needs to be weighed during the test. This improves the automation of the test bench and reduces the difficulty and workload of operation.

[0032] The compressed air pipeline is used to provide air pressure power for the pneumatic cylinder, and the compressed air pipeline can be connected to a compressed air source, such as an air compressor or an air tank, etc. In one embodiment, the compressed air pipeline is made of high-quality steel pipe, which has the advantages of strong pressure bearing capacity and corrosion resistance.

[0033] The connection clamps and clamps are used to fix the connection between the pneumatic cylinder and the compressed air pipeline. The design of the clamps and clamps can ensure the stability and reliability of the connection and prevent air pressure leakage and loosening.

[0034] The air supply valve of the pneumatic cylinder can be controlled by the centralized control knob plate near the test bench. The user can realize the air supply and air cut-off operation of the pneumatic cylinder by rotating the control valve on the knob plate. This control method makes the operation easier and faster, and improves the automation level of the test bench.

[0035] The fan subsystem is installed above the test chamber to simulate the air flow under working conditions. In this embodiment, two high static pressure centrifugal fans are used in conjunction with two sets of vertically structured test pipeline systems to allow air to flow vertically in the test chamber. The test pipeline system includes but is not limited to dust generating equipment, aerosol generators, particle counters, gas analyzers, etc., which can meet the comprehensive test of air filters with small air volumes (85m³ / h~1700m³ / h) and large air volumes (1700m³ / h~3400m³ / h). The fan system ensures stable airflow during the test and improves detection accuracy by precisely controlling the air flow.

[0036] The fans are all equipped with frequency converters and frequency converters (cabinets) to achieve precise air volume control. During the low air volume test, the fan subsystem controls a single fan to work, and its air volume adjustment range is 0 to 1750 cubic meters per hour (m³ / h). During the high air volume test, two fans work in parallel, and the total air volume adjustment range can be extended to 0 to 3500 cubic meters per hour (m³ / h).

[0037] Sensor module, the sensor module includes pressure sensor, temperature sensor, humidity sensor, flow meter, etc., which are used to monitor various parameters in the test process in real time, feedback the system's temperature, humidity, air volume, valve opening, operating frequency, pressure and other key information to ensure the accuracy and reliability of the test data.

[0038] The pressure sensor is used to monitor the changes in air pressure during the test to ensure that the pressure is stable during the test. The temperature sensor is used to monitor the changes in temperature during the test to ensure that the temperature is stable during the test. The humidity sensor is used to monitor the changes in humidity during the test to ensure that the humidity is stable during the test.

[0039] The flow meter is used to monitor the air flow changes in real time during the test and to feedback the current air volume value to ensure the stability of the flow during the test. In this embodiment, the flow meter models are 50MR2-8 and 50MR2-2. The high-precision laminar flow meter cooperates with the electric regulating valve to control the valve opening. When the set flow is reached, the valve opening signal stops.

[0040] The control software is connected to the variable frequency drive (cabinet) to control the fan motor frequency and provide feedback to the control system.

[0041] The data acquisition and processing subsystem is used to receive data from the sensor module, analyze and process it, and generate a test report. It can automatically collect, process and store test data, reduce manual intervention, and improve test efficiency. The test data can be viewed in real time through the control interface, and the data can be exported and analyzed as needed.

[0042] The data acquisition and processing subsystem processes and analyzes the received data, including data filtering, data calibration, data calculation, etc. Data processing can eliminate noise and errors in the data and improve the accuracy and reliability of the data.

[0043] The data acquisition and processing subsystem generates a test report based on the processed data. The test report includes information such as test time, test conditions, and test results. The test report is output through a printer or stored in a storage device for easy viewing and analysis by users.

[0044] During the test, the data acquisition and processing subsystem can automatically collect air volume data and draw real-time curves. Combined with the control of the fan and the electric regulating valve on the pipeline, the performance curve of time and air volume during the test can be obtained.

[0045] The data acquisition and processing subsystem also includes a differential pressure sensor, which is installed at the front and rear positions of the test platform to measure the pressure change of the sample to be tested during the test. In this embodiment, the measurement range of the differential pressure sensor covers 0 to 20 kilopascals (kPa), and the accuracy is ±0.5% of the full scale (FS), ensuring the accuracy and reliability of the measurement results. During the test, the differential pressure sensor can collect the pressure data of the sample to be tested in real time, and generate the performance curve of pressure difference and flow rate under different air volume conditions through data analysis.

[0046] Control interface, the upper right corner of the interface is the main control area of ​​the software, including "Information Entry", "Historical Data", "Operation Guide" and "Close". Users can enter the basic test information of the current experiment through the "Information Entry" interface, including basic information, filter information, etc. The real-time monitoring system will feedback the operating status of the system in real time in the software. Users can monitor the operating status of the system based on these real-time readings and make timely adjustments. In addition, users can also use the control interface to achieve "local" or "remote" control of the fan, high-precision opening control of the ball valve, and test settings and data linkage.

[0047] The specific implementation steps of using the experimental system of the present invention to test the performance of the air filter are as follows: Place the experimental system on a flat surface and ensure that the supporting frame is stable and reliable. Connect the compressed air pipeline to the compressed air source, ensure that the air pressure is stable, and turn on the system power.

[0048] Install the air filter to the designated position of the test chamber through the pneumatic cylinder. Adjust the air supply valve of the pneumatic cylinder to ensure that the air filter is firmly installed.

[0049] Enter the basic test information of the current experiment in the "Information Entry" interface of the control interface, including basic information, filter information, etc. Select the appropriate test pipeline and fan speed according to the test requirements.

[0050] Start the fan subsystem and start simulating the air flow under working conditions. Monitor various parameters in real time during the test, including pressure, temperature, humidity, flow, etc. Record the test data and observe any abnormal conditions during the test.

[0051] The data acquisition and processing subsystem processes and analyzes the received data and generates a test report based on the processed data, including test time, test conditions, test results and other information.

[0052] The disclosed embodiment also provides an experimental method for detecting an air filter, which utilizes the above-mentioned experimental system for detecting an air filter.

[0053] The above contents are only embodiments of the present invention. The common sense such as the known specific structures and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field to which the invention belongs before the application date or the priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for the ordinary technicians in the relevant field to implement this application. It should be pointed out that for the technicians in this field, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to explain the content of the claims.

Claims

1. An experimental system for testing air filters, characterized in that: include: The support frame is used to maintain the stability of the experimental system. The test chamber adopts a vertical test channel pipeline, with a cylinder at the top and bottom for loading and unloading air filters and absolute filters. Dual gas sampling ports are set downstream of the test chamber to separately sample particulate matter and gas filtration performance tests. The fan subsystem is installed above the test chamber to simulate air flow under working conditions. The sensor module is used to monitor various parameters in real time during the test process. The data acquisition and processing submodule is used to receive data from the sensor module, analyze and process it, and generate a test report.

2. The experimental system for testing air filters according to claim 1, characterized in that: The support frame is welded with steel and subjected to anti-corrosion treatment.

3. The experimental system for testing air filters according to claim 1, characterized in that: The fan subsystem uses two high static pressure centrifugal fans, with two sets of vertical structure test pipeline systems. It can call a single fan for small air volume test or call two fans for large air volume test. It is also equipped with frequency converter and variable frequency drive for air volume control.

4. The experimental system for testing air filters according to claim 1, characterized in that: Sensors include pressure sensors, temperature sensors, humidity sensors and flow meters, which are used to feedback the pressure, temperature, humidity and air volume of the system.

5. The experimental system for testing air filters according to claim 1, characterized in that: The gas sampling port is connected to the gas sampling analyzer and particle counter through a pipeline to complete the air filter's filtering performance test for harmful gases.

6. The experimental system for testing air filters according to claim 1, characterized in that: The test chamber is equipped with connection clamps and clamps to meet the requirements of loading and unloading different air filters and absolute filters.

7. The experimental system for testing air filters according to claim 6, characterized in that: The test chamber is also provided with a compressed air pipeline, which is connected to a compressed air source to provide air pressure power to the pneumatic cylinder, so that it is easy to install different types of air filters or absolute filters by moving up and down.

8. The experimental system for testing air filters according to claim 1, characterized in that: The data acquisition and processing subsystem can automatically collect air volume data and draw real-time curves. Combined with the control of the fan and the electric regulating valve on the pipeline, the performance curve of time and air volume during the test can be obtained.

9. An experimental system for testing air filters according to claim 1 or 8, characterized in that: The data acquisition and processing subsystem also includes a differential pressure sensor, which is installed at the front and rear positions of the test platform to measure the pressure changes of the test sample during the test. The data acquisition and processing subsystem also includes a differential pressure sensor, which is installed at the front and rear positions of the test platform to measure the pressure changes of the test sample during the test; the differential pressure sensor can collect the pressure data of the test sample in real time, and through data analysis, generate performance curves of pressure difference and flow under different air volume conditions.

10. An experimental method for testing an air filter, characterized in that: An experimental system for testing an air filter as described in claims 1-9 is used.

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