PURPOSE: To permit the operation of a refrigerating machine even when the temperature of cooling water is high by a method wherein one part of absorbing solution is sent into an absorber after distilling refrigerant by an evaporator and the balance of the same is sent into a condenser to contact it with vapor from a reproducer to effect absorption cooling and circulate it between the evaporator and the condenser.

CONSTITUTION: Vapor, generated from a reproducer 1, is introduced into a condenser 2 and is mixed with the other vapor generated by spraying concentrated weak liquid obtained by an evaporator 3 to effect absorption condensation. Concentrated strong liquid, obtained by absorption condensation, is sent into the evaporator 3 through a concentrated liquid heat exchanger 6 and, thereafter, refrigerant vapor is sent into an absorber 4. Hot brine is cooled by the latent heat of evaporation of the refrigerant to obtain low-temperature brine. The weak liquid, from which the refrigerant obtained by the evaporator 3 is removed, is returned to the condenser 2. The diluted weak liquid from the reproducer 1 is mixed with the vapor from the evaporator 3 in an absorber 4 and condensing heat is removed by cooling water in the group of cooling pipes to remove condensing heat and obtain the diluted strong liquid while the diluted strong liquid is sent into the reproducer 1 to complete an absorption cycle whereby high-temperature heat, fed to the heater of the reproducer 1, is taken out of the evaporator 3 as the low-temperature heat source and a refrigerating system can be completed.