Abstract: A method, and related refrigerated device, is provided for controlling a heater element of a refrigerated device having a compartment including an access door engageable with a perimeter of a compartment opening when the door is closed and a refrigeration circuit for cooling the compartment to a set point temperature, wherein the heater element heats a surface of the perimeter of the compartment opening to inhibit formation of condensation on the surface. The method involves: determining a temperature and relative humidity of ambient air surrounding the refrigerated device; determining a dew point temperature of the ambient air based upon the temperature and the relative humidity of the ambient air; and defining an energization level for the heater element based at least in part upon each of (i) the determined dew point temperature, (ii) the temperature of the ambient air and (iii) the set point temperature of the compartment.

Abstract: A method of automatically controlling a refrigerated device that includes a refrigeration system with an evaporator and an evaporator temperature sensor involves: (a) monitoring an output of the evaporator temperature sensor; (b) based upon monitored temperatures from (a), identifying when a rate of change in temperature indicated by the evaporator temperature sensor satisfies a set rate of change condition and determining if the temperature indicated by the evaporator temperature sensor when the rate of change satisfies to the set rate of change condition is consistent with a predefined expected temperature condition; (c) if the temperature indicated by the evaporator temperature sensor is consistent with the predefined expected temperature condition, taking a first refrigeration control action; and (d) if the temperature indicated by the evaporator temperature sensor is not consistent with the predefined expected temperature condition, taking a second refrigeration control action that is different than the

Abstract: A system and method for controlling a refrigeration system is disclosed. The system includes a cooled compartment, at least one heat source selectively activated to provide heat, at least one sensor, and a controller. The sensor detects a temperature and a relative humidity of ambient air that surrounds the cooled compartment. The controller is in communication with the at least one heat source and the at least one sensor. The controller includes logic for calculating a dew point temperature based on the temperature and the relative humidity. The controller also includes logic for selecting a region of operation based on at least one of the dew point temperature and the relative humidity, where the region of operation is representative of ambient conditions that surround the cooled compartment. The controller further includes logic for determining if the at least one heat source is activated based on the region of operation.

Abstract: A system and method for controlling a refrigeration system is disclosed. The system includes a cooled compartment, at least one heat source selectively activated to provide heat, at least one sensor, and a controller. The sensor detects a temperature and a relative humidity of ambient air that surrounds the cooled compartment. The controller is in communication with the at least one heat source and the at least one sensor. The controller includes logic for calculating a dew point temperature based on the temperature and the relative humidity. The controller also includes logic for selecting a region of operation based on at least one of the dew point temperature and the relative humidity, where the region of operation is representative of ambient conditions that surround the cooled compartment. The controller further includes logic for determining if the at least one heat source is activated based on the region of operation.

Abstract: A system and method for controlling a refrigeration system is disclosed. The system includes a cooled compartment, at least one heat source selectively activated to provide heat, at least one sensor, and a controller. The sensor detects a temperature and a relative humidity of ambient air that surrounds the cooled compartment. The controller is in communication with the at least one heat source and the at least one sensor. The controller includes logic for calculating a dew point temperature based on the temperature and the relative humidity. The controller also includes logic for selecting a region of operation based on at least one of the dew point temperature and the relative humidity, where the region of operation is representative of ambient conditions that surround the cooled compartment. The controller further includes logic for determining if the at least one heat source is activated based on the region of operation.

Abstract: A system and method for controlling a refrigeration system is disclosed. The system includes a cooled compartment, at least one heat source selectively activated to provide heat, at least one sensor, and a controller. The sensor detects a temperature and a relative humidity of ambient air that surrounds the cooled compartment. The controller is in communication with the at least one heat source and the at least one sensor. The controller includes logic for calculating a dew point temperature based on the temperature and the relative humidity. The controller also includes logic for selecting a region of operation based on at least one of the dew point temperature and the relative humidity, where the region of operation is representative of ambient conditions that surround the cooled compartment. The controller further includes logic for determining if the at least one heat source is activated based on the region of operation.