ABSORPTION TYPE HEAT PUMP

PURPOSE:To increase the coefficient of performance of an apparatus by a method wherein the condensation heat generated at a high-temperature part condenser is used as a driving heat source of a medium temperature part regenerator, and the condensation heat generated at the medium-temperature part regenerator is used as a driving heat source of a low-temperature port regenerator. CONSTITUTION:The condensation heat generated at a high-temperature part condenser 24 of a high-temperature part heat pump is used as a driving heat source of a medium- temperature part regenerator 33 of a medium-temperature part heat pump, and the condensation heat generated at a medium-temperature condenser 34 of the medium- temperature part heat pump is used as a driving heat source of a low-temperature part regenerator 43 of a low-temperature part heat pup In addition, a bromine lithium aqueous liquid is used as the working fluid of the low- and medium-temperature section heat pump and nitrate aqueous solution as the working fluid of the high-temperature section heat pump. Therefore, the heat generated in the system can be efficiently utilized, and corrosion of equipment and pipings can be mitigated even in the case the high-temperature section heat pump is operated at working temperatures of 15 deg.C or higher. As a result, the coefficient of performance can be increased.