Absorption refrigeration and air conditioning devices

A vapor absorption refrigeration device comprising:

• an absorber unit, wherein water vapor deriving from an evaporator unit is absorbed in a concentrated solution of lithium bromide releasing heat;
• a generator or concentrator unit comprising a generator column, a top and a base, wherein said top is fitted with a demister or mist-eliminator, wherein a diluted solution of lithium bromide is concentrated by energy absorbing evaporation, and wherein the generator or concentrator unit and the top of the generator or concentrator unit is rinsed by periodically regulating a small back-flow of highly diluted lithium bromide solution to the top of the generator column;
• a U-tube fitted between the absorber unit and the base of the generator unit;
• a condenser unit wherein vapor from the generator unit is cooled to a liquid by a coolant supply, said condenser unit comprising a plate heat exchanger cooled from an exterior supply and a pressure regulating u-tube which controls the difference in pressure between the pressure domains in the condenser unit and the evaporator unit, wherein the exterior supply comprises a supply of cooling water, circulated sea-water or low temperature coolant circulation from a ship in which the vapor absorption refrigeration device is placed;
• and
• an evaporator unit wherein the water deriving from the condenser unit is evaporated thereby extracting heat from the exterior source that is to be refrigerated.