Patent ID: 9638455
Date: 2017-05-02
CPC Classifications: F25D

Claim:
1. A refrigerator comprising: an evaporator configured to perform heat exchange with air in the refrigerator; a first heater configured to defrost the evaporator; a frost sensing unit configured to sense an amount of frost formed on the frost sensing unit; a second heater configured to remove the frost from the frost sensing unit; and a controller configured to: wherein the refrigerator includes a compressor, wherein the controller is configured to provide a cooling period when the compressor is on prior to the defrosting period, a pausing period when the compressor is off after the defrosting period, and a cooling period when the compressor is on after the defrosting period, wherein the controller is configured to control the second heater to be operated at least during at least the portion of the defrosting period and during the pausing period, and wherein the controller is configured to remove refrigerant from the evaporator during the defrosting period.