Blower and fan,blower and fan system,and method for supplying wind using the blower and fan system

摘要

An axial flow fan impeller 2, draws air in via a decorative grill 14, and discharges it via an outlet 104. The air is ducted by means including a bell mouth casing 5, and a thin plate 3, a centrifugal diffuser duct being defined. Flow directing plates 17 may be provided. Various different shapes of plate 3 are disclosed as are various outlet flow directing arrangements, including adjustable flow directing plates that can direct the outlet flow to counter external air currents. A heater may be provided to heat the airflow as it leaves the outlet. A plurality of the fans may be combined, side by side or back to back (eg. figs. 11 and 12), and an arrangement of fans to circulate air in a room is also disclosed. The fan has particular application to the provision of air curtains.