DEVELOPMENT OF DIRECT CALORIMETER FOR THERMOPHYSIOLOGICAL ANALYSIS OF CLOTHING SUBJECT

本研究的目的是研制用于服装热生理分析的直接式热量计。本年度对热量计的门部进行了隔热改进，采用隔热材料提高热流传感器的灵敏度。用橡胶加热器分别在水温（Tw）和环境温度（Ta）为22、28和34 ℃时校准了量热计的灵敏度。在Ta为22、28和34 ℃时，灵敏度的平均值分别为0.30、0.31和0.31mV/W;在Tw为22、28和34 ℃时，灵敏度的平均值分别为0.31、0.30和0.30mV/W。在Ta为22 ℃、相对湿度为45%的条件下，用热量计测量了6名健康女性受试者的手和前臂的热损失。平均身高158 cm，体重50 kg，体表面积1.45m^2。受试者分别穿着以下所示的三种不同服装之一：A型; T恤、短裤、内衣、袜子和运动鞋，B型;长袖训练服和A型服装，C型;工作手套和B型服装。A、B和C型服装的手和前臂热损失分别为3.2、6.6和7.4 W。热损失的增加与衣服重量和皮肤血流量的增加有关。这些结果表明，在本研究中开发的热量计是有用的服装受试者的热生理分析。

The aim of this study was to develop the direct calorimeter for thermophysiological analysis of clothing subject. The insulation of door part of the calorimeter was improved to enhance the sensitivity of heat flux sensors by using insulation materials in this year. A sensitivity of the calorimeter was calibrated with the rubber heater at water temperatures (Tw) and at ambient temperatures (Ta) of 22,28 and 34ﾟC,respectively. Mean of the sensitivity were 0.30,0.31 and 0.31 mV/W at Ta of 22,28 and 34ﾟC and were 0.31,0.30 and 0.30mv/W at Tw of 22,28 and 34ﾟC,respectively. Heat loss from the hand and forearm was measured by using the calorimeter at Ta of 22ﾟC and relative humidity of 45% in six healthy women subjects. Their mean hieght, weight and body surface area were 158cm, 50kg and 1.45m^2. The subjects wore one of the three different clothings shown in followings, type A ; T shirts, short pants, underwear, socks and sneakers, type B ; long sleeved training wear and type A clothing, type C ; working gloves and type B clothing, respectively. The heat loss from the hand and forearm was3.2,6.6 and 7.4 W in clothing type A,B and C,respectively. Increase in the heat loss was in relation to the increases of clothing weight and skin blood flow. These results show that the calorimeter developed in the study is useful for thermophysiological analysis of clothing subjects.