Patent ID: 7765818

Claim:
A refrigeration unit comprising: a housing including an insulated cavity configured to store food and beverages; a vapor cycle system disposed in the housing, the vapor cycle system operative to cool the food and beverages in the insulated cavity; a plurality of sensors disposed in the housing, the plurality of sensors in communication with the vapor cycle system and operative to output data relative to the vapor cycle system; and a controller comprising: an input module that receives, the data from the plurality of sensors, a processor communicatively coupled with the input module and operative to process the data from the plurality of sensors to determine an occurrence of an event related to the data from the plurality of sensors and effect a plurality of control and informational outputs relative to the data from the plurality of sensors, an output module communicatively coupled with the processor and operative to output control signals to the vapor cycle system as effected by the processor, and a memory module communicatively coupled with the processor, the memory module including a history log data structure to which the data from the plurality of sensors is logged as effected by the processor according to a first data-logging mode, and to which the data from the plurality of sensors is logged as effected by the processor according to a second data-logging mode upon occurrence of the event related to the data from the plurality of sensors as determined by the processor, wherein the first data-logging mode comprises the controller logging the data from the plurality of sensors at a first data-logging rate and the second data-logging mode comprises the controller logging the data from the plurality of sensors at a second data-logging rate different from the first data-logging rate.