| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas purifier designed so that photocatalyst activity (photocatalyst performance) of photocatalyst can be recognized with eyes, and having excellent function to decompose/eliminate harmful components in gas. SOLUTION: The gas purifier has a flow passage through which the gas can be flown, is structured so as to shield at least part of the flow passage to keep the photocatalyst, and is provided with at least a photocatalyst holding part designed so that at least part of the photocatalyst is visible. The photocatalyst holding part is provided with a gas permeable means at the inlet and the outlet of the passage. The purifier preferably has such a mode that the photocatalyst is kept at the photocatalyst keeping part via the gas permeable means so as not to drop off, and the photocatalyst can express the photocatalyst activity at least via visible light. The method for regenerating the gas purifier comprises taking out the photocatalyst in the gas purifier kept in the photocatalyst keeping part from the photocatalyst keeping part, burning the taken-out photocatalyst so as to express and/or activate the photocatalyst activity of the photocatalyst followed by putting the photocatalyst back into the photocatalyst keeping part. The smoking holder is provided with the gas purifier. COPYRIGHT: (C)2006,JPO&NCIPI
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