Compressor control device for refrigerator and method thereof

Abstract

A compressor control device for a refrigerator and a method thereof sense a momentary power failure by comparing a set revolutions per minute with an operation revolutions per minute, and control an on/off operation of the compressor according to a compressor driving state after a power comeback or during a power failure duration when occurring a momentary power failure, thereby protecting the compressor. The compressor control device includes: a revolutions per minute sensor for sensing an operation revolutions per minute of the compressor; and a controller which determines a momentary power failure by comparing the operation revolutions per minute sensed by the revolutions per minute sensor with a set revolutions per minute, and controls an on/off operation of the compressor according to a compressor driving state after a power comeback or during a power failure duration when occurring a momentary power failure. A compressor control method includes the steps of: (a) identifying a momentary power failure by comparing an operation revolutions per minute of the compressor with a set revolutions per minute; (b) determining whether a power failure duration is beyond a first set time; (c) turning off the compressor, if the power failure duration is determined to be beyond the first set time in the step (b); and (d) sensing a compressor driving state during a second set time if the power failure duration is below the first set time in the step (b), and turning on and off the compressor according to the sensed compressor driving state.