Investigating the impact of half-mask and accessory enhancements on the performance of filtering respiratory protective devices for fire self-rescue
In this study,a meticulous design has been developed to tackle the issues of deformation during prolonged storage and discomfort when donning filtering respiratory protective devices for self-rescue from fire.The current drawbacks related to half mask materials,air inlet design,and respirator packaging are thoroughly examined and analyzed.Based on these identified shortcomings in existing market products,a specific improvement scheme for respirator design is proposed.The objective is to effectively address these challenges and enhance the overall performance and user experience of such protective devices.Firstly,the structure of the half mask has been enhanced and the mask material has been modified to incorporate Thermoplastic Elastomer and Polypropylene.Addressing the limitations of traditional air inlet holes,the new canisters feature a dense,porous position design,with holes arranged in a circular pattern along the bottom of the canister.To rectify the shortcomings of traditional packaging,the half mask packaging has been upgraded to a user-friendly,easy-to-pull rigid shell,while the interior is vacuum-sealed in a plastic bag.Subsequently,the feasibility of these enhancements is assessed through rigorous testing,including the mask leakage coefficient test,inspiratory resistance test,and carbon monoxide permeation concentration test.The experimental results demonstrate that the improved product exhibits a significant improvement in performance compared to the original version.Specifically,the leakage coefficient in the breathing zone of the enhanced filtering respiratory protective devices is reduced by over 80％.Additionally,the inspiratory resistance is decreased by more than 30％,while the inspiratory and expiratory resistance is reduced by over 60％.Furthermore,the carbon monoxide permeation concentration is decreased by 45％.The optimized performance parameters notably surpass the values mandated by international standards.The improved packaging and the newly designed half-mask effectively mitigate existing storage and discomfort issues,resulting in better facial fit and reduced application time for the device.The decrease in the air leakage coefficient substantially diminishes the amount of hazardous materials to which the user may be exposed,thereby enhancing user safety.
万方数据
维普
