JPS6490968A - Absorption refrigerator - Google Patents

Abstract

PURPOSE: To reduce a deterioration in performance by a method wherein at least two cooling devices for refrigerant liquid are arranged in the midway of a refrigerant liquid passage ranging from a condensor to an evaporator, a downstream side cooling device for the refrigerant liquid is arranged at an outlet side of an air flow at the evaporator and an upstream side cooling device is arranged in the surrounding atmosphere. CONSTITUTION: Refrigerant liquefied by a condenser C is cooled within a primary cooling device CR1 with surrounding atmosphere, its temperature is decreased and further it is cooled with cold air within a secondary cooling device CR2 , resulting in that its temperature is decreased and its pressure is decreased down approximately to values of a saturation temperature and a saturation vapour pressure within an evaporator E. Owing to this fact, as compared with that of the prior art having no cooling device, a flash accompanied by a self-evaporation of the liquid refrigerant flowed out of a distribution device 4 is scarcely produced or a severe flashing of it is remarkably weakened. A degree of bad influence of a liquid film against its formation at the inner wall surface of a heat transfer pipe ET is correspondingly substantially decreased and concurrently an amount of liquid droplets dropped within a space of the pipe while they are not gasified yet is also remarkably reduced and then a reduction of heat exchanging calorie between the surrounding atmosphere outside the pipe and the liquid refrigerant within the pipe is effectively decreased.