摘要
为了降低正压防护服内的噪声,在正压防护服内分流气管末端安装自主设计的复合消声器。在3个不同供气压力条件下,对正压防护服降噪前后内部噪声、压差和供气流量进行了检测。穿着前,正压防护服降噪前噪声为84.5~98.4 dB,降噪后降至69.2~77.6 dB,最大降幅达20.8 dB;穿着后,降噪前噪声为71.5~83.4 dB,降噪后为56.8~72.7 dB,最大降幅为14.8 dB。不论穿着前或穿着后,降噪前和降噪后的供气流量均大于300 L/min,最大流量时降噪前和降噪后的压差均大于100 Pa。结果显示,通过安装消声器能够有效降低正压防护服内的噪声,对内部压差、供气流量的影响较小,在符合相关标准要求的同时提高了实验人员的舒适性。
To reduce the noise in positive pressure protective suits,a self-designed composite muffler is installed at the end of the diverter air tube.Under three air supply pressure conditions,the internal noise,pressure difference,and air supply flow rate are tested before and after noise reduction by the positive pressure protective suit.Before wearing,the noise of the positive pressure protective suit before noise reduction is in the range of 84.5 to 98.4 dB,and it decreases to 69.2 to 77.6 dB after noise reduction,with a maximum reduction of 20.8 dB.After wearing,the noise before noise reduction is 71.5 to 83.4 dB,and it is 56.8 to 72.7 dB after noise reduction,with a maximum reduction of 14.8 dB.Whether before or after wearing,the air supply flow rate before and after noise reduction is greater than 300 L/min,and the pressure difference before and after noise reduction at the maximum flow rate is greater than 100 Pa.The results show that the installation of the muffler can effectively reduce the noise inside the positive pressure protective suit,has little impact on the internal pressure difference and air supply flow rate,and meets the relevant standards while improving the comfort of laboratory technicians.
作者
陈学平
吴舢菏
郭鑫
赵兴平
郑吟秋
代青
王云川
Chen Xueping;Wu Shanhe;Guo Xin;Zhao Xingping;Zheng Yinqiu;Dai Qing;Wang Yunchuan(Institute of Medical Biology,Chinese Academy of Medical Sciences&Peking Union Medical College,Kunming)
出处
《暖通空调》
2026年第2期187-191,共5页
Heating Ventilating & Air Conditioning
基金
中国医学科学院医学与健康科技创新工程项目(编号:2021-I2M-1-036)
中央高校基本科研业务费专项资金资助项目(编号:3332018)。
关键词
生物安全四级实验室
正压防护服
噪声
消声器
性能测试
biosafety level-4 laboratory
positive pressure protective suit
noise
muffler
performance test
