| 摘要 |
PURPOSE:To prevent the growth of bacteria for thereby performing a hygienically safe ventilation, while maintaining a latent heat exchanging efficiency, by causing a heavy metal or a substance containing a heavy metal to deposit on a diaphragm surface. CONSTITUTION:A substance 8 containing a heavy metal plus a traditional hygroscopic material is deposited on a diaphragm 4. The heavy metal includes, for example, Ag, Cu, Zn, Cd and Hg etc., which are present independently, or as a chloride, as a metallic salt such as a nitrate or a metallic oxide. As for instance, a diaphragm made of a bleached kraft paper with a LiCl added as a hygroscopic material is sprayed with a bacteria and tested. It was experienced that the bacteria growth rate was accelerated where no heavy metal was added, and some bacterias died where AgCl and CuCl were added in the 1wt% of diaphragm weight. |
