Automated Evaporator Coil Cleaning for Elimination of Mold and Bacteria

Pathogens can thrive in the damp environment of an evaporator coil or cooling tower in an air conditioner. To ameliorate this problem, an automatic fluid-delivery prototype is built to mix three constituent parts of a cleaner in prescribed amounts then spray the solution onto an evaporator coil. Flow rates, system geometry, and chemical compatibilities are all considered. The prototype is part of the Internet of Things (IoT) and costs $1,000. The machine is designed for a two-ton air conditioner but is expandable for larger systems.