Patent ID: 7942014

Claim:
A method for defrosting an evaporator of a refrigeration sealed system, the refrigeration sealed system including a refrigeration compartment and a controller operatively coupled to a compressor, a defrost heater, an evaporator fan and a condenser fan, said method comprising: initiating a defrost cycle; operating the sealed system to prechill the refrigeration compartment; sensing a temperature of the evaporator by at least one sensor operatively coupled to the evaporator; and operating at least one of the evaporator fan and the condenser fan for one of a predetermined time interval and until a predetermined temperature of the evaporator is attained, in response to the data received from the at least one sensor, prior to activating the defrost heater to raise a temperature of the evaporator after lowering a temperature of the refrigeration compartment to a predetermined target temperature that is below a user-selected set point temperature.