Patent ID: 6668568
Filing Date: 2003-12-30
Classification: F25B,F25D,G05D,Y02B

Abstract:
A method for controlling a refrigeration system, the refrigeration system including a fresh food compartment and a freezer compartment with a damper establishing flow communication therebetween, a sealed system for forcing cold air through the refrigerator compartments, the sealed system including an evaporator fan and a fresh food compartment fan, the refrigerator further including a controller operatively coupled to the damper, the evaporator fan and the fresh food fan, said method comprising the steps of:accepting a plurality of control inputs; determining a state of the refrigeration system in a two-dimensional logic control grid based upon the control parameter inputs; and executing an optimal control algorithm for the determined state of the refrigeration system, wherein said step of executing the optimal control algorithm includes continuing to change the determined state to operate the refrigeration system in a new state until the new state reaches a steady state, the new state having parameters that are different than parameters of the control parameter inputs, the change being based on a set of rules, and the steady state being a state in which the fresh food and the freezer compartments are maintained at target temperatures.