ENVIRONMENTAL CONTROL AIRHOUSE WITH VARIABLE OUTPUT

摘要

Airhouse units (10) for supplying conditioned air to the interior areas of an enclosed building. Each airhouse unit incorporates one or more blowers (25) having variable speed controllers enabling them to be operated at variable volumetric flow rates. The airhouse unit housing includes variable area dampers (82, 84) for controlling the inlet of outside or building return air. A dedicated controller is provided for adjusting the inlet areas of the two inlet pathways (74) to provide a constant flow velocity through a direct fire burner (66) through a range of blower volumetric output settings. In addition, the units may include variable area diffuser units (46) which tend to maintain constant discharge velocity pressure at various blower volumetric flow rate settings. In addition, various control and operating strategies are provided for the individual airhouse units and a distributed array of such units in a large building structure controlled by a central computer.