背景雾化吸入器依据装置工作原理的不同分为压力射流雾化器、超声雾化器和振动筛网雾化器。振动筛网雾化器近年在国内逐渐发展,但目前对振动筛网雾化器研究较少。目的比较振动筛网雾化器与压力射流雾化器雾化时间和雾化后残余量的差异...背景雾化吸入器依据装置工作原理的不同分为压力射流雾化器、超声雾化器和振动筛网雾化器。振动筛网雾化器近年在国内逐渐发展,但目前对振动筛网雾化器研究较少。目的比较振动筛网雾化器与压力射流雾化器雾化时间和雾化后残余量的差异。方法2019-05-19至2019-06-19,分别选择三种品牌压力射流雾化器与对应的振动筛网雾化器(分别记为A、B、C),采用平行队列分析法,比较三种品牌压力射流雾化器与相对应的振动筛网雾化器在雾化6 ml 0.9%氯化钠溶液时所需的雾化时间及雾化后残余量;并比较三种品牌振动筛网雾化器在雾化6 ml 0.9%氯化钠溶液时所需的雾化时间和雾化后残余量。结果A、B、C品牌压力射流雾化器雾化6 ml 0.9%氯化钠溶液所需的雾化时间长于振动筛网雾化器,雾化6 ml 0.9%氯化钠溶液后残余量多于振动筛网雾化器(P<0.05);三种品牌压力射流雾化器雾化6 ml 0.9%氯化钠溶液所需的平均雾化时间〔(21.35±2.26)min〕长于振动筛网雾化器〔(13.55±2.92)min〕(Z=-6.42,P<0.05)。三种品牌压力射流雾化器雾化6 ml 0.9%氯化钠溶液后平均残余量〔(0.47±0.05)ml〕多于振动筛网雾化器〔(0.03±0.02)ml〕(Z=-6.67,P<0.05)。B、C品牌振动筛网雾化器雾化6 ml 0.9%氯化钠溶液所需的雾化时间均短于A品牌振动筛网雾化器(P<0.05);B品牌振动筛网雾化器雾化6 ml 0.9%氯化钠溶液后的残余量多于A品牌振动筛网雾化器,C品牌振动筛网雾化器雾化6 ml 0.9%氯化钠溶液后的残余量少于A品牌振动筛网雾化器(P<0.05)。结论雾化6 ml 0.9%氯化钠溶液时,振动筛网雾化器雾化所需的雾化时间及雾化后残余量均少于压力射流雾化器,值得在临床和家庭推广使用。展开更多
Kinetic energy efficiency of atomizing air,by C is the ratio of the effective energy required for atomization to the kinetic energy of the atomizing air.The present study analyzes the variation of C with the Reynolds ...Kinetic energy efficiency of atomizing air,by C is the ratio of the effective energy required for atomization to the kinetic energy of the atomizing air.The present study analyzes the variation of C with the Reynolds number of atomazing air stream,Ohnesorge number and air to liquid mass ratio. Atomization of non-Newtonian fluids with viscosity up to 4.4 Pa·s is carried out by using a specially designed prefilming airblast atomizer. Drop sizes are measured by using laser diffraction technique. For liquids with low viscosities,impingement of air stream on the liquid film dominates the atomization process and film thickness exercises only minor influence on C ; while for liquids with high viscosities,disintegration of liquid film is made by the impingement of air stream on the liquid film and the wavy movement of film,and C is higher for thinner liquid film in the same operation conditions.The shear force on the surface of liquid film formed by swirling atomizing air plays an important role in the atomization of film in the conditions of low air velocities and low liquid viscosities and its influence on atomization gradually weakens with increasing atomizing air velocity and liquid viscosity.Eventually impinging on the liquid film dominates the atomization process.展开更多
文摘背景雾化吸入器依据装置工作原理的不同分为压力射流雾化器、超声雾化器和振动筛网雾化器。振动筛网雾化器近年在国内逐渐发展,但目前对振动筛网雾化器研究较少。目的比较振动筛网雾化器与压力射流雾化器雾化时间和雾化后残余量的差异。方法2019-05-19至2019-06-19,分别选择三种品牌压力射流雾化器与对应的振动筛网雾化器(分别记为A、B、C),采用平行队列分析法,比较三种品牌压力射流雾化器与相对应的振动筛网雾化器在雾化6 ml 0.9%氯化钠溶液时所需的雾化时间及雾化后残余量;并比较三种品牌振动筛网雾化器在雾化6 ml 0.9%氯化钠溶液时所需的雾化时间和雾化后残余量。结果A、B、C品牌压力射流雾化器雾化6 ml 0.9%氯化钠溶液所需的雾化时间长于振动筛网雾化器,雾化6 ml 0.9%氯化钠溶液后残余量多于振动筛网雾化器(P<0.05);三种品牌压力射流雾化器雾化6 ml 0.9%氯化钠溶液所需的平均雾化时间〔(21.35±2.26)min〕长于振动筛网雾化器〔(13.55±2.92)min〕(Z=-6.42,P<0.05)。三种品牌压力射流雾化器雾化6 ml 0.9%氯化钠溶液后平均残余量〔(0.47±0.05)ml〕多于振动筛网雾化器〔(0.03±0.02)ml〕(Z=-6.67,P<0.05)。B、C品牌振动筛网雾化器雾化6 ml 0.9%氯化钠溶液所需的雾化时间均短于A品牌振动筛网雾化器(P<0.05);B品牌振动筛网雾化器雾化6 ml 0.9%氯化钠溶液后的残余量多于A品牌振动筛网雾化器,C品牌振动筛网雾化器雾化6 ml 0.9%氯化钠溶液后的残余量少于A品牌振动筛网雾化器(P<0.05)。结论雾化6 ml 0.9%氯化钠溶液时,振动筛网雾化器雾化所需的雾化时间及雾化后残余量均少于压力射流雾化器,值得在临床和家庭推广使用。
文摘Kinetic energy efficiency of atomizing air,by C is the ratio of the effective energy required for atomization to the kinetic energy of the atomizing air.The present study analyzes the variation of C with the Reynolds number of atomazing air stream,Ohnesorge number and air to liquid mass ratio. Atomization of non-Newtonian fluids with viscosity up to 4.4 Pa·s is carried out by using a specially designed prefilming airblast atomizer. Drop sizes are measured by using laser diffraction technique. For liquids with low viscosities,impingement of air stream on the liquid film dominates the atomization process and film thickness exercises only minor influence on C ; while for liquids with high viscosities,disintegration of liquid film is made by the impingement of air stream on the liquid film and the wavy movement of film,and C is higher for thinner liquid film in the same operation conditions.The shear force on the surface of liquid film formed by swirling atomizing air plays an important role in the atomization of film in the conditions of low air velocities and low liquid viscosities and its influence on atomization gradually weakens with increasing atomizing air velocity and liquid viscosity.Eventually impinging on the liquid film dominates the atomization process.