Patent ID: 6101825
Filing Date: 2000-08-15
Classification: F24F,F25D,G05D

Abstract:
A refrigerator having a device for opening/closing cool air supply ports, said device for controlling supply of cool air into a cooling compartment, said refrigerator comprising:a plurality of temperature sensors installed in said cooling compartment for sensing a temperature in said cooling compartment;a motor for driving said opening/closing device;a zero-crossing detector for detecting zero-crossing time points of an alternating current supplied to said motor;a triac for controlling supply of the alternating current to said motor; anda microcomputer for controlling said motor by turning said triac on according to the number of input pulses inputted thereto from said zero-crossing detector, the number of input pulses corresponding to a time required for operating said motor so that an open degree of the cool air supply ports is controlled by said opening/closing device at a predetermined degree which is calculated based on a temperature difference between a standard temperature of said cooling compartment and an average value of temperature of said cooling compartment sensed by said temperature sensors.