Room ventilation system using air supply jets - controls low level primary and secondary air flows to produce downwards flow

摘要

The room ventilating system uses an air supply arrangement from e.g. ducting, with noiseless supply jets secondary air is carried away from a low level and mixed with outgoing primary air before the mixture of primary and secondary air to the upper zone is supplied to form a sinking path at the finishing region. The secondary air carried away before mixing with the primary air can be heated or cooled. The proportion of the stepped air jets is specified in terms of the length and diameter of the various steps.