The development of absorption refrigeration has attracted people’s attention under the theme of energy conservation and environmental protection. As one of the core techniques

the development of absorption refrigeration working pairs plays an important role. Some hot topics in the field of absorption refrigeration were enumerated and the gap between theoretical research and practical application problems were pointed out. According to the differences of refrigeration

there are five groups of working pairs

such as ammonia

water

alcohol

fluoride

etc. Historical and current situation of the five-group working pairs were reviewed and defects of the traditional ones were analyzed. This paper explored the relevant optimization measures

new working pairs and compared their performance with that of the traditional ones. In addition

the current research situation of NH3-NaSCN and NH3- LiNO3 was emphasized and a comparison between their advantages and disadvantages in different conditions was made. Moreover

different kinds of salt combinations were introduced to replace LiBr and weaken the corrosivity of LiBr-H2O. On the basis of current researches

more works should be done on the improvement of existing working pairs’ performance and exploration of new ones.