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首页> 外文期刊>Applied Ergonomics >Evaluation of thermal and evaporative resistances in cricket helmets using a sweating manikin
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Evaluation of thermal and evaporative resistances in cricket helmets using a sweating manikin

机译：使用出汗的人体模型评估板球头盔的耐热和耐蒸发性

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The main objective of this study is to establish an approach for measuring the dry and evaporative heat dissipation cricket helmets. A range of cricket helmets has been tested using a sweating manikin within a controlled climatic chamber. The thermal manikin experiments were conducted in two stages, namely the (i) dry test and (ii) wet test. The ambient air temperature for the dry tests was controlled to ～23℃, and the mean skin temperatures averaged ～35℃. The thermal insulation value measured for the manikin with helmet ensemble ranged from 1.0 to 1.2 clo. The results showed that among the five cricket helmets, the Masuri helmet offered slightly more thermal insulation while the Elite helmet offered the least. However, under the dry laboratory conditions and with minimal air movement (air velocity = 0.08 ± 0.01 ms~(-1)), small differences exist between the thermal resistance values for the tested helmets. The wet tests were conducted in an isothermal condition, with an ambient and skin mean temperatures averaged ～35℃, the evaporative resistance, R_(et), varied between 36 and 60 m~2 Pa W~(-1). These large variations in evaporative heat dissipation values are due to the presence of a thick layer of comfort lining in certain helmet designs. This finding suggests that the type and design of padding may influence the rate of evaporative heat dissipation from the head and face; hence the type of material and thickness of the padding is critical for the effectiveness of evaporative heat loss and comfort of the wearer. Issues for further investigations in field trials are discussed.
机译：这项研究的主要目的是建立一种测量干式和蒸发式散热板球头盔的方法。已在受控气候室内使用出汗人体模型对一系列板球头盔进行了测试。热人体模型实验分两个阶段进行，即（i）干试验和（ii）湿试验。干测试的环境温度控制在〜23℃，平均皮肤温度平均〜35℃。带头盔的人体模型测得的隔热值介于1.0至1.2克之间。结果表明，在五种板球头盔中，Masuri头盔提供的隔热性略高，而Elite头盔提供的隔热性最少。然而，在干燥的实验室条件下且空气流动最少（空气速度= 0.08±0.01 ms〜（-1）），被测头盔的热阻值之间存在很小的差异。湿法试验在等温条件下进行，环境温度和皮肤平均温度平均约为35℃，蒸发阻力R_（et）在36至60 m〜2 Pa W〜（-1）之间变化。蒸发散热值的这些较大变化是由于某些头盔设计中存在厚厚的舒适衬里层所致。这一发现表明，衬垫的类型和设计可能会影响头部和面部的蒸发散热速率。因此，填充材料的类型和厚度对于蒸发热损失的有效性和穿着者的舒适度至关重要。讨论了在田间试验中进一步研究的问题。

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