Patent ID: 8689603
Filing Date: 2014-04-08
Classification: B01D,F24F,G01N,Y02B

Abstract:
1. A method for controlling an air treatment system comprising the steps of: providing a blower motor operable at a plurality of blower speeds; providing a light sensor having an output based on a particulate level; providing, in computer readable memory, a reference voltage for the light sensor; taking a plurality of sample readings from the light sensor output; resetting the reference voltage for the light sensor as a function of an average of the plurality of sample readings from the light sensor output; and operating the blower motor at one of the plurality of blower speeds in response to a further reading from the light sensor output as compared to the reset reference voltage, wherein each of the plurality of blower speeds corresponds to a subrange of possible light sensor output values, wherein each subrange includes a variable size that is determined based on the reset reference voltage.