Patent ID: 6168646
Filing Date: 2001-01-02
Classification: B01D,F24F,H05K

Abstract:
A method for the control of flow rate of a filtered temperature control fluid through equipment comprising: passing the fluid through a length portion of filter material at the upstream end of a fluid flow passage of the equipment and the along the passage; and upon attaining an undesirably low rate of fluid flow through the length portion of filter material as determined by one of a drag effect created upon a rotational speed of a fan disposed close to the length portion of filter material, an amount of flex of the length portion of filter material, and a temperature in a downstream region of the fluid flow passage, causing the length of filter material to advance longitudinally to move at least some of the length portion from the upstream end of the fluid flow passage and move unused filter material across the upstream end of the flow passage thereby to increase fluid flow through the filter material above the undesirably low rate.