Patent ID: 7716937
Filing Date: 2010-05-18
Classification: F25B,F25D,Y02B

Abstract:
1. A method of controlling a refrigeration system in a refrigerator comprising the steps of: measuring a freezer compartment temperature and an ambient temperature; determining a freezer compartment upper temperature limit, a freezer compartment lower temperature limit, a freezer compartment set-point temperature, and a fresh-food compartment set-point temperature; comparing the freezer compartment temperature with the freezer compartment upper temperature limit and the freezer compartment lower temperature limit; and operating at least one of a variable speed compressor, a condenser fan, and an evaporator fan based on a comparison of the freezer compartment temperature, the freezer compartment set-point temperature, the fresh-food compartment set-point temperature and the ambient temperature wherein a first control logic or algorithm is used for operating the at least one of the variable speed compressor, the condenser fan, and the evaporator fan for when the freezer compartment temperature is greater than the freezer compartment upper temperature limit, a second control logic or algorithm is used when the freezer compartment temperature is greater than a freezer compartment lower temperature limit and less than a freezer compartment upper temperature limit, and a third control or algorithm is used when the freezer compartment temperature is less than the freezer compartment lower temperature limit.