加热卷烟抽吸过程中气溶胶动态分布表征系统的开发

为表征加热卷烟气溶胶的生成、传递、扩散和过滤过程, 设计开发气溶胶取样微探针和定位固定系统, 并与气溶胶快速粒径谱仪相结合, 通过加热器具的改造、取样和抽吸的联动控制, 构建了加热卷烟抽吸过程中气溶胶动态分布的表征系统。结果表明:①在加热器具改造的基础上, 气溶胶取样微探针可插入加热卷烟内部, 实现微量气溶胶的实时原位取样；②定位固定系统通过对加热器具和气溶胶取样微探针的固定和移动, 可实现微探针插入位置的精确控制, 控制精度为0.01 mm；③通过微探针取样与吸烟机抽吸软件的联动控制, 实现了加热卷烟抽吸与气溶胶实时原位取样的同步进行。该气溶胶动态分布表征系统操作方便, 可实现加热卷烟抽吸过程气溶胶动态分布的表征, 用于气溶胶的形成过程研究。 

Development of a system for characterizing aerosol dynamic distribution from heated tobacco product during smoking

In order to characterize the generation, transmission, diffusion and filtration processes of aerosol from heated tobacco product, an aerosol sampling microprobe and a positioning and fixing system were designed and combined with a fast particle size spectrometer. A system for characterizing aerosol dynamic distribution from heated tobacco product during smoking was developed via heating device modification and linkage control between sampling and smoking. The results showed that: 1)Based on the modified heating device, aerosol sampling microprobe could be inserted into the heated tobacco section to realize in-situ real-time aerosol sampling. 2)By fixing and moving the heating device and aerosol sampling microprobe, the positioning and fixing system accurately controlled the insertion position of the microprobe with a control accuracy of 0.01 mm. 3)With the linkage control between the microprobe's sampling and smoking machine's smoking, the synchronization of smoking and in-situ aerosol sampling was realized. The developed system is convenient in operation and capable of characterizing the aerosol dynamic distribution from heated tobacco product during smoking, it can be used to study the formation process of aerosol.