ABSORPTION WATER COOLER/HEATER

PROBLEM TO BE SOLVED: To provide an absorption type water cooler/heater without a separate heat exchanger by switching cooling and heating operation mdes by an opening and closing valve and improving the utilization factor of exhaust heat and the reduction ratio of fuel. SOLUTION: An absorption water cooler/heater comprises an evaporator 9, an absorber 10, a high temperature regenerator 11, a low temperature regenerator 12, a condenser 13 and an exhaust heat burning regenerator 20. The machine includes a weak solution line L1 in which the absorber communicates with the high temperature regenerator through the regenerator 20, a solution line L3 between the high and low temperature regenerators, a solution line L5 between the low temperature regenerator and the absorber, a refrigerant line L11 from the high temperature regenerator to the condenser via the low temperature regenerator, a vapor line L20 between the regenerator 20 and the condenser, a refrigerant line L13 between the condenser and the evaporator, an opening and closing valve A3 provided in a vapor line L33 branching from the refrigerant line L11 to the evaporator and an opening and closing valve A20 provided in a vapor line L50. The opening and closing valves A3 and A20 are closed upon cooling and opened upon heating.