Patent ID: 6357243
Filing Date: 2002-03-19
Classification: G05D

Abstract:
A system for controlling the operation of an evaporative cooler of the type having a plurality of cooler pads, a cooling liquid reservoir, a pump having a motor for circulating cooling liquid from said reservoir onto said cooler pads, a blower fan having a motor with a plurality of speeds for drawing outside air through said cooler pads and for discharging it into an air duct distribution system, an electrical disconnect, a control switch, and wires connecting a main power source with said electrical disconnect and said control switch, said system comprising:a. a control device selected from the group consisting of thermostats, time clocks, manual switches, occupancy sensors, telephone transponders, and computer interfaces, b. a signal transmitter for transmitting a signal using a technology selected from the group consisting of power line carrier, radio frequency, radar, infrared, visible light, laser, and ultrasonic, c. a receiver for said signal, d. a switching device for coupling and uncoupling said motors of said pump and said fan from said power source, e. a switching device for changing speeds of said fan motor, whereby a signal from said control device can be transmitted from a multitude of locations and received by said switching devices thereby energizing, de-energizing, and changing speeds of said fan and pump motors and no additional wires are required.