EVAPORATOR FOR AMMONIA ABSORPTION TYPE REFRIGERATING DEVICE

PROBLEM TO BE SOLVED: To improve the refrigerating efficiency by using a plate type heat- exchanger as an evaporator with a simple constitution and circulating a refrigerant without using a power. SOLUTION: A refrigerant is naturally circulated from a low pressure liquid receiver 30 to an evaporator 20 having a structure as a plate type heat- exchanger. A refrigerant in a gas liquid mixed state from the evaporator 20 flows out through a return refrigerant outflow port 33 fronting on an inner wall surface 32 on one side in the axial direction of a drum body 31 on the liquid level of the low pressure liquid receiver 30 from a refrigerant return pipe 25. A flow a refrigerant returned to a portion closer to a central part from the inner wall surface 32 is reduced in a force by a multi-hole plate 34 and gas and liquid are easily separated from each other. Refrigerant liquid 40 flows down from a refrigerant flow down port 37 through a refrigerant flow down pipe 26 and flows in the evaporator 20. The gas refrigerant is fed through a refrigerant gas outlet 38 to an absorber. A part of the refrigerant liquid 40 is extracted as a bleed refrigerant from a bleed piping 43 connected to a bleed outlet 39.