Cooling air supply control apparatus of refrigerator

A refrigerator, comprising:

• a refrigerating chamber having a rear wall;
• a duct disposed at the rear wall for guiding a flow of cold air, the duct including at least one group of horizontally spaced cold air inlet openings for discharging cold air into respective horizontally adjacent areas of the refrigerating chamber;
• temperature sensors for detecting temperatures in different regions of the refrigerating chamber;
• a motor-driven fan for circulating cold air through the duct and the cold air inlet openings and into the refrigerating chamber;
• a damper arranged adjacent the group of cold air inlet openings and being rotatable about an axis, said damper arranged eccentrically relative to the axis for adjusting cold air flows through the cold air inlet openings relative to one another depending on a rotary position of the damper;
• a stepping motor connected to the damper for rotating the damper about the axis;
• a switch for determining a rotational position of the damper;
• and
• a control mechanism connected to the temperature sensors and the stepping motor for comparing sensed temperatures with a reference temperature and rotating the damper for establishing a quantity of cold air through the air inlet openings in accordance with the magnitude of a difference between sensed temperatures and the reference temperature.