Cooling system and related equipment for refrigeration units

Abstract

A system includes a fan connecting to a refrigeration unit that provides air at a cooler temperature than that which is monitored in the refrigeration unit. The fan is activated when the temperature outside of the refrigeration unit is cooler than inside the refrigeration unit. A filter filters air that is forced into the refrigeration unit by the fan. A controller can turn on and off the fan and a compressor of the refrigeration unit. Flaps are provided to prevent air from entering the refrigeration unit when the fan is turned off, or the temperature outside the refrigeration unit is warmer than within the refrigeration unit.

1 . A system comprising a fan connecting to a refrigeration unit that provides air at a cooler temperature than that which is monitored in the refrigeration unit by a thermostat of the refrigeration unit, the fan being controlled by a thermostat that is independent of the thermostat of the refrigeration unit, such that the fan will be activated when the temperature detected by the thermostat associated with the fan is at or below a threshold value. 
     
     
         2 . The system of  claim 1 , further comprising a relief duct that dissipates positive pressure within the refrigeration unit. 
     
     
         3 . The system of  claim 1 , wherein the thermostat of the refrigeration unit detects a temperature within the refrigeration unit above the threshold value and activates a compressor of the refrigeration unit. 
     
     
         4 . The system of  claim 3 , wherein the fan is off when the thermostat of the refrigeration unit detects a temperature within the refrigeration unit above the threshold value. 
     
     
         5 . The system of  claim 1 , wherein the fan is activated when the temperature outside of the refrigeration unit is cooler than inside the refrigeration unit. 
     
     
         6 . The system of  claim 1 , further comprising a filter for filtering air being forced into the refrigeration unit by the fan. 
     
     
         7 . The system of  claim 1 , further comprising a controller, which can turn on and off the fan and a compressor of the refrigeration unit. 
     
     
         8 . The system of  claim 1 , further comprising flaps to prevent air from entering the refrigeration unit when the fan is turned off, or the temperature outside the refrigeration unit is warmer than within the refrigeration unit. 
     
     
         9 . A kit comprising the components of  claim 1 . 
     
     
         10 . (canceled)