SPRAY SYSTEMS

摘要

A spray system comprises a spray head (1) mounted on a stationary part of a horizontal ceiling sweep fan (3) and may to fed e.g. from a tube (19) which extends to a reservoir (20) for the spray head via the supporting tube (10) for the fan. The reservoir is programmed to supply spray at predetermined intervals and for predetermined lengths of time during the operation of the fan e.g. to control infectious diseases. The invention is not limited to such uses or to horizontal ceiling sweep fans.