Patent ID: 8261563

Claim:
A refrigerator condenser assembly, comprising: a refrigerator condenser pipe containing a refrigerator cooling agent; and an additional cooling system for cooling the refrigerator condenser pipe, comprising: an evaporator structure enclosing a volume adjacent to the refrigerator condenser pipe, wherein the volume contains an additional cooling substance that is a light boiling liquid, the evaporator structure with the cooling substance therein serving as an evaporator portion for the additional cooling system, the light boiling liquid receiving thermal energy from the refrigerator condenser pipe at the evaporator structure so as to transform the light boiling liquid into a gaseous state; a remote condensing unit located remotely from and above the refrigerator condenser pipe, the remote condensing unit condenses the additional cooling substance from the gaseous state to a liquid state; and vapor and condensed vapor lines that connect the remote condensing unit and the evaporator structure that convey the additional cooling substance in the gaseous state from the evaporator structure to the condensing unit and the condensed vapor line conveys the additional cooling substance from the condensing unit to the evaporator structure, a vapor block in the condensed vapor line to prevent vapor from flowing from the evaporator structure to the remote condensing unit through the condensed vapor line so that the additional cooling substance can circulate through the evaporator structure and the condensing unit and the vapor and condensed vapor lines only in a single circulation direction; the evaporator structure and the remote condensing unit and the vapor and condensed vapor lines forming a circulatory system that moves the additional cooling substance through the additional cooling system by gravity to provide cooling of the refrigerator condenser pipe when an ambient temperature at the remote condensing unit is at a predetermined temperature differential below a temperature at the evaporator structure.