| 摘要 |
<p>The system has an air recycling circuit (13) extended between an inner air inlet (3) of a casing (1) and an air outlet (18) opening in an air supply circuit (10). The recycling circuit comprises, in its connection zone with the supply circuit, a controllable air mixer for obtaining a fresh air stream, recycled air stream or fresh and recycled air mixture at an outlet of the supply circuit. The mixer is controlled based on air flow rate of a forced air circulation unit (11) e.g. fan, to replace air extracted from a zone (16) ventilated by the circulation unit, with the fresh air stream.</p> |
