Patent ID: 9625223
Date: 2017-04-18
CPC Classifications: B60H,F01P,F28G

Claim:
1. A self-cleaning fan assembly, comprising: a fan; a heat exchanger, wherein said fan is positioned to force air through said heat exchanger in a first direction when said fan rotates in a first rotational direction; a fan controller coupled to said fan, wherein said fan controller controls a rotational direction of said fan; and a processor coupled to said fan controller, said processor configured to track a total number of use cycles of said fan and to automatically perform a heat exchanger cleaning cycle after said total number of use cycles has exceeded a preset value, wherein said heat exchanger cleaning cycle is performed by temporarily altering said rotational direction of said fan from said first rotational direction to a second rotational direction, wherein said fan forces air through said heat exchanger in a second direction when said fan rotates in said second rotational direction, and wherein said second direction is opposite to said first direction.