The medical surgical mask (MSM) has been the essential protective equipment in people's daily work. The experimental purpose is to explore the effects of wearing MSM on human thermal sensation, thermal comfort, and breathing comfort in office buildings in summer. A total of 30 healthy college students were recruited for the testing. The experiment was carried out in a climate chamber, which can simulate the office buildings in summer. The experiment collects the subjects’ skin temperature, microclimate in the mask, and subjective votes, including thermal sensory votes (TSV), thermal comfort votes (TCV), and respiratory comfort votes (BCV). Experimental results show that wearing MSM has no significant effect on the skin temperature of the human body. The microclimate temperature inside the MSM reaches over 34℃, and the relative humidity reaches over 70%. The high-temperature and high-humidity microclimate put human beings in an uneven thermal environment, which leads to poor human tolerance to the thermal environment and becomes the main reason for destroying human thermal comfort. Wearing MSM has a significant impact on the subjective thermal sensation, thermal comfort, and breathing comfort of the human body, and the impact becomes more significant as the environmental temperature increases. Once the mask is taken off, the human body will enter an extremely comfortable environment, resulting in an excessively high vote value. The difference in voting values before and after removing the mask becomes larger with the environmental temperature. By fitting the voting results and perform data processing, it can be found that wearing MSM will reduce the neutral temperature by 1.5°C, and the environmental temperature with the optimal thermal comfort by 1.4°C, and as the temperature increases, the respiratory discomfort will become more and more intense. Regardless of whether wearing a MSM, the subjects preferred a slight warmer environment. In conclusion, with the increase of ambient temperature, wearing MSM can cause the human worse tolerance to the thermal environment, and this disturbance will become more and more intense.

中文翻译：

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夏季医用外科口罩改变室内人员热心理的扭曲力

医用外科口罩（MSM）一直是人们日常工作中必不可少的防护用品。实验目的是探讨夏季办公楼佩戴MSM对人体热感觉、热舒适度和呼吸舒适度的影响。共招募了30名健康的大学生进行测试。实验在气候室进行，可以模拟夏季的办公楼。实验收集受试者的皮肤温度、面罩内的小气候和主观投票，包括热感觉投票（TSV）、热舒适投票（TCV）和呼吸舒适投票（BCV）。实验结果表明，佩戴MSM对人体皮肤温度没有明显影响。MSM内部小气候温度达到34℃以上，相对湿度达到70%以上。高温高湿的小气候使人类处于不均匀的热环境中，导致人类对热环境的耐受性差，成为破坏人体热舒适性的主要原因。佩戴MSM对人体的主观热感、热舒适度和呼吸舒适度有显着影响，并且随着环境温度的升高，影响变得更加显着。一旦摘下口罩，人体就会进入一个极其舒适的环境，导致投票值过高。去除掩膜前后投票值的差异随着环境温度的升高而变大。通过拟合投票结果并进行数据处理，可以发现，佩戴MSM会使中性温度降低1.5°C，热舒适度最佳的环境温度降低1.4°C，并且随着温度的升高，呼吸不适会越来越强烈。无论是否穿着 MSM，受试者都喜欢稍微温暖的环境。综上所述，随着环境温度的升高，佩戴MSM会导致人体对热环境的耐受性变差，这种干扰会越来越强烈。