Light emitting diode assemblies for illuminating refrigerated areas

Abstract

An LED assembly for illuminating a refrigerated area includes a plurality of LED modules and a reflector base configured to reflect light generated by the plurality of LED modules into the refrigerated area. The reflector base is further configured to conduct heat away from the plurality of LED modules and also includes a base cooling channel. Both the reflector base and the plurality of LED modules are located substantially within the refrigerated area. The LED assembly also includes an external heat sink coupled to the reflector base, and configured to conduct heat away from the reflector base, wherein the external heat sink is further configured to be mounted substantially outside the refrigerated area. The LED assembly can include a doom lens that forms a doom cooling channel substantially enclosing the reflector base. This internal heat sink includes an internal sink cooling channel.

1 . A light emitting diode (LED) assembly useful for illuminating a refrigerated area, the LED assembly comprising:
 a plurality of LED modules;   a reflector base configured to reflect light generated by the plurality of LED modules into the refrigerated area and is further configured to conduct heat away from the plurality of LED modules, wherein the reflector base includes a base cooling channel, and wherein the reflector base and the plurality of LED modules are configured to operate substantially within the refrigerated area; and   an external heat sink coupled to the reflector base, and configured to conduct heat away from the reflector base, wherein the external heat sink is further configured to be mounted substantially outside the refrigerated area.   
     
     
         2 . The LED assembly of  claim 1  further comprising a doom lens forming a doom cooling channel substantially enclosing the reflector base. 
     
     
         3 . The LED assembly of  claim 1  further comprising an internal heat sink configured to be mounted substantially within the refrigerated area and further configured to conduct heat from the reflector base to the external heat sink and wherein the internal heat sink includes an internal sink cooling channel. 
     
     
         4 . The LED assembly of  claim 1  wherein the external heat sink includes an external sink cooling channel. 
     
     
         5 . A light emitting diode (LED) assembly useful for illuminating a refrigerated area, the LED assembly comprising:
 a plurality of LED modules;   a conductive base configured to conduct heat away from the plurality of LED modules coupled to the conductive base, wherein the conductive base includes a base cooling channel, and wherein the conductive base and the plurality of LED modules are configured to operate substantially within the refrigerated area;   an external heat sink coupled to the conductive base, and configured to conduct heat away from the conductive base, wherein the external heat sink is further configured to be mounted substantially outside the refrigerated area; and   wherein at least one of the plurality of LED modules includes:
 an LED base; 
 an LED located substantially within the LED base and configured to generate a light beam; 
 an inner beam director; and 
 an outer beam director, wherein an interface between the inner beam director and the outer beam director is shaped to refract and reflect the light beam along the interface, thereby narrowing a substantial portion of the light beam. 
   
     
     
         6 . The LED assembly of  claim 5  wherein the LED has a geometrically coated phosphor layer. 
     
     
         7 . The LED assembly of  claim 5  wherein the interface between the inner beam director and the outer beam director includes an intermediate beam director configured to further refract and reflect the light beam generated by the LED. 
     
     
         8 . The LED assembly of  claim 5  wherein the shaped interface is curved. 
     
     
         9 . The LED assembly of  claim 5  wherein the shaped interface is highly reflective. 
     
     
         10 . The LED assembly of  claim 7  wherein the intermediate beam director is highly reflective. 
     
     
         11 . The LED assembly of  claim 5  wherein the inner beam director has a first N value and the outer beam director has a second N value, and wherein the first N value is substantially lower than the second N value. 
     
     
         12 . The LED assembly of  claim 5  further comprising a doom lens forming a doom cooling channel substantially enclosing the conductive base. 
     
     
         13 . The LED assembly of  claim 5  further comprising an internal heat sink configured to be mounted substantially within the refrigerated area and further configured to conduct heat from the conductive base to the external heat sink and wherein the internal heat sink includes an internal sink cooling channel. 
     
     
         14 . The LED assembly of  claim 5  wherein the external heat sink includes an external sink cooling channel.