To facilitate air-cooling of a condenser and make the corrosion- resistant technique of a high grade unnecessary by employing hydrofluorocarbon refrigerant having no problem of destroying ozone layer as refrigerant.
Thin absorbing solution is supplied from an absorber 5 into a reproducer 3 through a solution heat exchanger 10 and a solution pump 7 to evaporate refrigerant in the regenerator 3 by heating the thin absorbing solution by heating gas supplied from an external source and condense the absorbing solution. On the other hand, the reproducer 3 is provided with a fractionater 8 at the outlet port thereof to liquefy evaporated refrigerant supplied from the regenerator 3 into the condenser 4 through the fractionater 8. Further, the refrigerant, liquefied in the condenser 4, is supplied into the evaporator 6 of an indoor machine 2 through an expansion valve 11 and is vaporized in the evaporator 6 by depriving heat of a room. The vaporized refrigerant is supplied from the evaporator 6 into the absorber 5 of an outdoor machine 1 while thick absorbing solution is supplied from the generator 3. In this case, hydrofluorocarbon is used as the refrigerant.
TANIGUCHI BUNICHI
YAKUSHIJI SHIRO
IZUMITANI NAOAKI
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