| 摘要 |
The subject of the present invention is a two-stage filter for burial vaults or (tomb) recesses. It consists of the combination of two chambers (1, 2) arranged inside the mortuary cell, traversed successively by the air emerging from the vault or recess, the first containing an absorbent filtering mass (8), based on activated charcoal, for example, the second being filled with an oxidising material (11) which destroys microorganisms and viruses, the purified air ending up outside by virtue of a chimney (4) provided with an anti-insect grid (13) and communicating with the second chamber. It is intended for filtering and for purifying the air escaping from vaults, mortuary cells or recesses, while still permitting the penetration of the outside air. <IMAGE> |
