The Design Analysis And Improvement Of Automobile Air-conditioner Filter Testing Equipment

Air-conditioning filter is an important component of automotive air-conditioning system,its design performance directly affects the cab air quality and the health of passengers.The air-conditioning filter is detected by air-conditioning filter detection device to determine its performance in the development process of the use,in order to ensure that filter products meet the design requirements.With the improvement of indoor air quality requirements,the development of air-conditioning filter detection devices becomes more urgent.The current he test room air uniformity requirements on air-conditioning filter detection device is high The detection device model is established in the simulation software Fluent in this paper.to study the effect of the structure of the honeycomb cell structure and test room bend parameters on its performance,the main work is as follows:1)The characteristics of different types of testing equipment are discussed in the air-conditioning filter testing equipment standard,and the advantages of various testing equipment are compared and analyzed,and the testing device introduced in the standard dust filter test is built,and the three-dimensional model of the air-conditioner filter detection device is established.After the appropriate simplification,the CFD calculation model of the detection device is established,and the simulation calculation of the detection device is completed.2)Based on the established CFD model,the performance of the cell structure of the test cell and the structural parameters of the corridor on the filter detection device are analyzed.By analyzing the air velocity trajectory?the cross section velocity and the speed deviation coefficient of the cross section,it shows that the air velocity uniformity of the test chamber is poor at this time,and two structures resulting in poor uniformity of the air velocity in the test chamber are found.So,it is proposed to add the transition radius inside the elbow and to install the cell in the test chamber to improve the air velocity uniformity of the test chamber.3)The structure to be improved is designed,and the air velocity uniformity degree under each structural parameter is analyzed After analyzing the structural parameters with the smallest deviation coefficient of the section velocity are found and the structures are combined with the original model as the improved model.Compared with the original model,the velocity deviation coefficient at the 0.05 m section of the test chamber is reduced by 18.3%,and the velocity deviation coefficient at the section position-0.18 m is reduced by 66.2%,and the velocity deviation coefficient at the section position-0.41 m is reduced by 78.8%,and the modified model has smaller cross sectional velocity deviation coefficient at the cross section of 0.05,-0.18,and-0.41 m than 0.1 which is required in the automotive industry standard.4)According to the improved model,a test station was built to test the velocity deviation coefficient of the test chamber.The test results and the simulation results have a difference of 7.86%,which verified the correctness of the simulation.According to this equipment,section of the air conditioning filter classification filtration efficiency is tested to check the test accuracy of the test equipment compared with the actual filtration efficiency of the filter.