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Enhanced economy refrigeration control system

  • US 9,766,004 B2
  • Filed: 04/05/2012
  • Issued: 09/19/2017
  • Est. Priority Date: 04/29/2011
  • Status: Active Grant
First Claim
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1. A controller for controlling a refrigeration unit, the controller configured for:

  • storing instructions for a first refrigeration setting having a first average power consumption and a first range of temperature variation;

    storing instructions for a second refrigeration setting having a second average power consumption and a second range of temperature variation, wherein the first average power consumption is lower than the second average power consumption, and the second range of temperature variation is smaller than the first of temperature variation;

    tracking a cumulative average temperature in a refrigeration element; and

    activating either the first refrigeration setting or the second refrigeration setting, wherein the controller activates the first refrigeration setting while the cumulative average temperature is within a selected temperature range having a lower threshold and an upper threshold, and once the cumulative average temperature is less than the lower threshold or greater than the upper threshold of the selected temperature range, the controller activates the second refrigeration setting until the cumulative average temperature is within a target temperature range that has a second lower threshold that is greater than the lower threshold of the selected temperature range and a second upper threshold that is less than the upper threshold of the selected temperature range.

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