| 摘要 |
Apparatus for reducing the bacterial content of the air, of the type comprising at least a radiation chamber, provided with at least an ultraviolet radiation source and disposed between an entry for the air to be treated and an exit for the treated air, ventilation means to move the air between said entry and said exit, and means for shielding the ultraviolet radiation to prevent its exit by the same apparatus; apparatus wherein said shielding means include an optic labyrinth formed by walls developing, at least partially, according to a curve defining a path to prevent the passage of the ultraviolet radiation, allowing the free passage of the air.
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