Patent ID: 8190273
Filing Date: 2012-05-29
Classification: F24F,Y02B

Abstract:
1. A method of controlling a variable-speed fan of an environmental maintenance module that controls temperatures of a plurality of zones of a building, the method comprising: (a) for each zone: (b) identifying a first critical zone by analyzing the first zone temperature errors; (c) using the first zone temperature error of the critical zone to determine a final speed setting, wherein using the zone temperature error of the critical zone to determine a speed setting of the variable-speed fan includes: inputting the first zone temperature error of the first critical zone to a first proportional-integral-derivative (PID) calculator; and calculating a first estimated speed setting of the variable-speed fan based on the first zone temperature error and at least one of a previous estimated speed setting and/or a previous first zone temperature error of the variable-speed fan; and (d) controlling, with a controller, the variable-speed fan based on the final speed setting.