环境温度(Ta)和环境湿度(Tw)、气体流速(V)的综合影响,可引起人体过热的环境,称为热环境。太阳辐射或在劳动环境中存在的热源放出的辐射热,除直接作用于人体外,还可使周围物体加热,再以辐射、传导、对流散热等方式作用于人体,因而太阳辐射和热辐射是热环境中的重要致热因素。劳 The combination of ambient temperature (Ta) and ambient humidity (Tw) and gas flow rate (V) can cause the human body to overheat, called the thermal environment. Solar radiation or radiant heat emitted by the heat source existing in the working environment, besides directly acting on the human body, can also heat the surrounding objects and then act on the human body by means of radiation, conduction, convection and heat dissipation, etc. Therefore, the solar radiation and heat radiation are Thermal environment is an important cause of heat. labor