Patent ID: 8826679
Filing Date: 2014-09-09
Classification: F25B,F25D,Y02B

Abstract:
1. A method for providing refrigerator compartment temperature control, comprising: providing a housing including a fresh food compartment and a freezer compartment; providing a controller, a compressor, and a condenser; positioning an evaporator within the freezer compartment or fresh food compartment; positioning an evaporator fan to provide air flow across the evaporator; positioning a fresh food fan within the fresh food compartment such that operation of the fresh food fan draws airflow from the freezer compartment to the fresh food compartment; providing, second, and third temperature sensors; configuring the controller to provide a plurality of control loops, including a first control loop configured to maintain a target evaporator fan operating speed by continuously modulating the operating speed of the compressor based on the evaporator fan operating speed specified by the controller in implementing a second control loop; configuring the controller to provide the second control loop configured to monitor temperature from the second temperature sensor and to continuously modulate the operating speed of the evaporator fan to maintain a prescribed freezer compartment temperature, wherein the second temperature sensor is located with the freezer compartment; and configuring the controller to provide a third control loop configured to monitor temperature from the third temperature sensor and to continuously modulate the operating speed of the fresh food fan to maintain a prescribed temperature in the fresh food compartment, wherein the third temperature sensor is located within the fresh food compartment; wherein the first control loop is embedded with respect to the second control loop.