安全帽送风强度对人体呼吸微环境影响研究  

Study on the effect of air supply intensity of the helmet on human respiration micro-environment

作　　者：孟晓静[1,2] 薛鑫鑫 付林志 刘启薇 黄玉杰 MENG Xiaojing;XUE Xinxin;FU Linzhi;LIU Qiwei;HUANG Yujie(School of Resource Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China;National Key Laboratory of Green Building,Xi'an 710055,China)

机构地区：[1]西安建筑科技大学资源工程学院,西安710055 [2]绿色建筑全国重点实验室,西安710055

出　　处：《安全与环境学报》2024年第9期3335-3342,共8页Journal of Safety and Environment

基　　金：国家重点研发计划资助项目(2018YFC0705306)。

摘　　要：为改善作业人员呼吸微环境,对送风式安全帽佩戴者呼吸微环境温度场、速度场和浓度场进行研究。通过假人试验方法测试安全帽在不同送风强度下的人体呼吸微环境温度、速度和粉尘质量浓度,研究人体呼吸微环境温度分布及速度分布规律,阐明安全帽送风强度对人体呼吸微环境中总尘及呼尘降尘效果的影响,进而分析佩戴者对安全帽送风强度的满意程度。结果显示,人体面中部位降温效果优于人体脸颊两侧,其中人体鼻子处降温效果较为明显;安全帽在不同送风强度下对人体呼吸微环境速度场的分布规律一致;当送风强度为Ⅳ级时,人体呼吸微环境内粉尘降尘效率最高,佩戴者满意率最高;人体微环境总尘和呼尘降尘效率分别可达到81.39%和82.89%。研究结果可为改善人体呼吸微环境提供参考。To improve the respiratory micro-environment of workers and reduce the risk of human occupational exposure,the temperature field,velocity field,and concentration field of the respiratory micro-environment of air-supplied helmet wearers were studied.A test platform was set up.The temperature,velocity,and dust concentration of the human respiratory micro-environment under different air supply intensities of the helmet were tested by employing the dummy test.The temperature distribution and velocity distribution of the human respiratory micro-environment were studied.The influence of the air supply intensity of the helmet on the total dust and respirable dust in the human respiratory micro-environment was clarified.The PS model was introduced to predict the wearer's satisfaction under different air supply intensities of the helmet.The results show that the cooling effect of the human respiratory micro-environment decreases along the X-axis direction,and the vertical cooling effect decreases along the Z-axis direction.The cooling effect of the middle part of the human face is better than that of the sides of the cheeks.The cooling effect is more obvious at the measuring point of the human nose.The velocity distributions of the human respiratory micro-environment under different air supply intensities of the helmet are consistent.The airflow range of the human respiratory micro-environment affected by the air-supplied helmet expands with air supply intensity.When the air supply intensity of the helmet is gradeⅣ,the dust reduction efficiency in the human respiratory micro-environment is the highest,and the wearer's satisfaction rate is the best.The dust reduction efficiency of total dust and respirable dust in the human respiratory micro-environment reaches 81.39%and 82.89%,respectively.The results of this study provide a reference for improving the human respiratory micro-environment.

关 键 词：安全卫生工程技术 安全帽 送风强度 假人试验 呼吸微环境 

分 类 号：X96[环境科学与工程—安全科学]