Temperature controlling method and apparatus for refrigerator using

Abstract

A temperature controlling method and apparatus for a refrigerator by controlling the velocity of a rotary blade are provided. In the temperature controlling method, a fuzzy model for inferring an equilibrium velocity corresponding to the rotation velocity of the rotary blade, required for the temperature equilibrium within a refrigeration compartment, is constituted and then the fuzzy inference is performed based on the fuzzy model using the change in temperature measured at a predetermined number of portions within the refrigeration compartment to calculate the equilibrium velocity, thereby controlling the rotation velocity of the rotary blade according to the calculated equilibrium velocity. Accordingly, temperatures of each portion are accurately inferred from the fuzzy model using the values of temperature changes sensed by only a small number of temperature sensors and then the rotation velocity of the rotary blade is appropriately controlled according to the inferred positions into which cool air is to be discharged. As a result, the cool air is appropriately discharged into each portion according to the distance between the rotary blade and a target position, so that the optimal temperature equilibrium is obtained in the refrigeration compartment.