【作者】 张连庆； 阴金香； 林天舒；

【Author】 lianqing Zhang, jinxiang Yin, tianshu Lin Tsinghua university chemistry education experiment center,100084,Beijing

【机构】 清华大学化学系实验中心；

【Abstract】 this text aims at the using tap water in experiment in chemistry does the cooling water to exhaust directly, resulting in the waste of resources of water. We researched to manufacture the evaporation type cools off water circulation the equipments with the evaporation type water constant temperature slot. This equipments investment is small, movement the expenses is low, suiting the laboratory the usage very much .更多还原