OBJECT DETECTOR FOR AIR CONDITIONER

An object detector for an air conditioner has a signal detection input unit in which a light block is provided between a pair of Fresnel lenses spaced in parallel by a predetermined distance on a printed circuit board, thereby defining substantially three detection areas. The signal detection input unit detects the number, locations and movement distance of persons present indoor from a received signal, and outputs a signal representative of the information. Then, a command for the operation of an air conditioner is issued according to the information signal, thereby enabling the optimum operation of the air conditioner under circumstances.