The research of deodorizer performance evaluation method in the life space ～Part. 2

Odor generated in living spaces is discharged outdoors by ventilation. However due to furniture layouts, the ventilation air flow sometimes does not reach odorous materials, and the resulting lingering of odors causes marked discomfort. A measure against odors in places where malodorous materials remain is the placement of deodorants. A previous study1） showed the effectiveness of deodorants under ventilation in experiments using small chambers (2m3). In this study, we continuously generated hydrogen sulfide, which contributes to garbage odor, in an experimental space (15.6m3) simulating a real space, and assessed a method for evaluating deodorant performance under ventilation based on the distributions of the hydrogen sulfide concentration in the space before and after the placement of a deodorant. As a result, when the ventilation air flow was obstructed by furniture, a concentration gradient of hydrogen sulfide was present, emanating from its source. When a deodorant was placed in an area with a high hydrogen sulfide concentration, about a 50% reduction in its concentration was confirmed near the deodorant. If a distance between the deodorant and a source of hydrogen sulfide increases, the effect of reducing its concentration was lost. We have concluded that the method proposed in this study can be useful for evaluating deodorants under ventilation.