Patent ID: 7935311

Claim:
An air purifier comprising: a tubular main body having a plurality of air movement holes on a circumferential wall portion surrounding an inner space; an annular upper member having an outer circumferential edge fitted into an upper edge of the circumferential wall portion; a base member having a circumferential edge fitted into a lower edge of the circumferential wall portion; and a light applicator disposed in the inner space for throwing light toward an inner surface of the wall portion, upper member and base member; wherein the wall portion, upper member and base member each have an inner side made of a formed porous member for exposure to the light, the formed porous member including the inner surface formed with a plurality of projections and recesses exposable to the light from the light applicator, the formed porous member including the inner surface having a surface part supporting a powdery photocatalyst for a photocatalytic reaction caused by the light, for air moving through the air movement holes to pass a proximity of the projections and recesses which support the photocatalyst, wherein, each of the projections and recesses has an outward facing surface having an air movement hole, wherein the projections and recesses are provided by an array of outwardly sunken recesses formed in the inner surface of the porous member, each of the recesses including a bottom wall at the terminus of the projection having the air movement hole formed therein; and each recess is formed like a bowl or a cup sunken from the inner surface toward an outer side of the tubular main body.