Defrost cycle determination device and method of the refrigerator

摘要

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an evaporator of a refrigerator, and more particularly, to an apparatus and method for determining a defrosting cycle of a refrigerator, by installing an idea sensor on the top of the evaporator to determine an effective defrost cycle of the evaporator.;In order to remove the frost on the evaporator in the past, a defrost heater was placed at the bottom of the evaporator to set a regular defrosting cycle so that it was performed regularly. In spite of the frost, the defrost heater did not work, which lowered the cooling efficiency.;Therefore, in the present invention, the frost sensor generated from the bottom of the evaporator rises by installing the frost sensor 18 having a structure in which electrodes 18a are installed at predetermined intervals on the evaporator 12, thereby increasing the frost sensor 18. When a small amount of current is energized and a difference of more than 15 ° C. is compared with the temperature of the temperature detecting sensor 16 which detects the temperature of the freezer compartment, the controller recognizes this when the small amount of current is supplied to the electrode 18a. The defrost heater 13 was operated to effectively remove the frost of the evaporator.