充气防寒服的保暖性能

Thermal insulation of air inflatable cold protective clothing

为维持户外活动人体热舒适性,研发一种保暖性能可调的防寒服装,以满足人体在不同活动量或环境温度变化情况下对服装保暖性能的需求,评价了一件充气服装的保暖性能,通过“Newton”出汗暖体假人实验测试了充气服装在4种充气量和3种风速下的上身总热阻和局部热阻。实验结果表明:充气状态下胸部、腹部和背部的局部热阻以及上身总热阻显著大于未充气状态,但是充气量之间没有明显差异;充气服装局部热阻和上身总热阻均随着风速的增加显著降低,不同充气量之间也没有显著差异。研究表明,充气服装在一定程度上可以作为一种有效的手段动态调节服装的保暖性。

In order to maintain outdoor body thermal comfort,cold protective clothing with adjustable thermal insulation property is needed to meet their demand under condition of different activities or ambient temperature changes.Thermal insulating property of air inflatable clothing was evaluated in this study.The total and local thermal insulation of the air inflatable clothing was examined by thermal manikin"Newton"in four air inflating volumes and three air speeds.The results reveal that the local thermal insulation in the chest,abdomen and back as well as the total thermal insulation of upper body are significantly greater in the inflated clothing than in the uninflated clothing,but the air inflation volume has no significant effect on the thermal insulation.Meanwhile,the local and total thermal insulation of the air inflated clothing significantly decreases with the increasing of the air speed,and no significant difference is observed between the clothing with different air inflation volumes.This study shows that air inflatable clothing can be used as an effective strategy to dynamically adjust the clothing thermal insulation.