Patent ID: 9335085
Filing Date: 2016-05-10
CPC Classification: F25B,F25D

Claim Text:
1. A condenser evaporator system containing gaseous ammonia refrigerant and liquid ammonia refrigerant, the system comprising: (a) a condenser constructed for condensing the gaseous ammonia refrigerant provided at a condensing pressure to the liquid ammonia refrigerant; (b) a gaseous refrigerant feed line for feeding the gaseous ammonia refrigerant to the condenser; (c) a controlled pressure receiver for holding the liquid ammonia refrigerant; (d) a first liquid refrigerant feed line for conveying the liquid ammonia refrigerant from the condenser to the controlled pressure receiver; (e) an evaporator for evaporating the liquid ammonia refrigerant; (f) a second liquid refrigerant feed line for conveying the liquid ammonia refrigerant from the controlled pressure receiver to the evaporator, wherein the condenser evaporator system is constructed so that the condenser and the evaporator are balanced during a refrigeration cycle; and (g) wherein the condenser evaporator system is constructed to operate in a refrigeration cycle and in a defrost cycle, and the condenser evaporator system is constructed to operate in the defrost cycle wherein the gaseous ammonia refrigerant provided at a condensing pressure is fed to the evaporator or wherein the condenser evaporator system is constructed to operate in the defrost cycle wherein the liquid ammonia refrigerant from the evaporator is fed to the condenser for evaporation.