| 摘要 |
PURPOSE:To prevent dust from adhering on a rear surface of an objective to be purified and to increase the dust removing effect for all the objectives by ejecting an air current which is rotated for said objective to be purified. CONSTITUTION:A nozzle for air shower constituted by utilizing a punkah louvre 7 is fitted to an air chamber via a fitting seat 14 and a fitting through hole 15 and used. In this state, an air ejecting port 10 can be directed in the optional directions by rotating the nozzle main body 8 around the center of sphere of a spherical cylinder part 11 while resisting the frictional force between an annular supporting part 13 and a sealing medium 16 thereof. Then, when the air supplied to the inside of the air chamber is passed through the inside of the nozzle main body 8, the air rotates rotating blades 22 and flowed out from said port 10 as a swirling current due to the rotation of the blades 22, therefore no space of negative pressure is formed on a rear surface of objective and sufficient dust removing effect is obtained.
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