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(一)前 言 众所周知,人体代谢不断产生的热量通过辐射、对流、传导和蒸发等方式散发到外界环境。然而,当环境气温升到35℃以上,超过皮肤温度时,蒸发散热就成为唯一可能的散热方式。在此状态下,穿着服装的水汽通透性如何,就是人-服装-环境系统中热平衡的决定性和限制性因素。因此,建立合理的服装蒸发散热性能评价指标,在高温防护方面对服装鉴定及提出相应生理卫生学安全耐受标准有着广泛的实用价值。 (二)研究概况 1941年Gagge提出了服装热阻值的定量单位 (clo)及其测量方法,此后服装生理学有了较大发展。但是没能解决评价服装蒸发散热性能的定量
(A) Preface As we all know, the heat generated by the metabolism of the human body is radiated to the external environment through radiation, convection, conduction and evaporation. However, when the ambient temperature rises above 35 ° C and exceeds skin temperature, evaporative cooling becomes the only possible way to dissipate heat. In this state, the permeability of the water vapor in the garment is the decisive and limiting factor in the heat balance in the man-garment-environment system. Therefore, the establishment of a reasonable appraisal index of evaporative cooling performance of apparel has a wide range of practical value in appraising apparel and putting forward corresponding safety standards of physiological hygiene in high-temperature protection. (B) Research Overview 1941 Gagge proposed clothing thermal resistance value of the unit of measurement (clo) and its measurement method, after which the clothing physiology has made great progress. But failed to solve the quantitative evaluation of clothing evaporative cooling performance