| 摘要 |
<p>PROBLEM TO BE SOLVED: To remove causal substances for indoor malodor, harmful chemical matter, etc., that annoy many persons. SOLUTION: Charcoal is put in a box where a ventilating fan by a drive motor is installed, and contaminated indoor air is sucked in the box by the ventilating fan, and air is collided against it, whereby the efficiency of the adsorption force of charcoal is raised, and the convection of indoor air is produced.</p> |
