正压防护服用供气背包设计及其数值模拟与实验

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中图分类号：TP202 DOI：10.3969/j.issn.1004-132X.2025.06.023 开放科学（资源服务）标识码（OSID）：

Design and Numerical Simulation and Experiments of Gas Supply Backpacks for Positive Pressure Protective Clothing

HOU Yulei1 LI Ximeng1SUO Huai²LI YuelZENG Daxing' * 1.School of Mechanical Engineering，Yanshan University，Qinhuangdao，Hebei， 2.Qinhuangdao Gaha Medical Electronic Instrument Co.，Ltd.，Qinhuangdao，Hebei， 3.School of Mechanical Engineering，Dongguan University of Technology，Dongguan， Guangdong，

Abstract：At present，the function of positive pressure protective clothing is relatively single，the high internal temperature and difficult pressure control resulted in low safety and comfort. Therefore， a supporting device integrating supply/exhaust， filtration and cooling functions was proposed. The data required to maintain a slightly positive pressure state within the protective clothing was tested，and the structure of the air-supply backpack was designed in modules. A heat transfer analysis was conducted on the semiconductor refrigeration module，and a simulation model was established to analyze the impacts of profile dimensions on refrigeration performance based on CFD （computational fluid dynamics）. The parameters of temperature and pressure were stabilized by fuzzy PID control，the transfer function was solved，the controller was designed and verified by Simulink simulation. The FLUENT simulation model of micro positive pressure protective clothing was built to analyze the distribution law of flow field and temperature field in protective clothing and the influences of air supply temperature. The prototype of air supply backpacks was developed and the temperature and humidity of protective clothing were tested. The results show that the air supply backpacks may dehumidify to normal ambient humidity within 3O s and reduce 5°C compared with room temperature within 100s

Key words： positive pressure protective clothing； gas supply backpack； semiconductor refrigera-tion;FLUENT simulation; temperature and humidity testing

0 引言

防护服是各种污染环境中进行检测、救援等任务的基本防护装备，但目前传染病防控及生化实验室人员所用防护装备生理舒适性较差[1]，正压防护服若在保证用户安全的同时能够为其提供洁净空气，并持续排出身体热量和产生的浊气，则可有效提高穿戴的舒适性[2]。（剩余17116字）