Abstract: A regenerator for use in an ammonia absorption refrigerator comprises a heater for heating an ammonia aqueous solution and a rectifying column for enriching ammonia in an ammonia solution-vapor mixture obtained in and introduced from the heater, wherein the heater comprises a heater body having a heating chamber, a burner of lean pre-mixture combustion type disposed in a lower portion of the heating chamber, and a heat transfer tube bundle provided in a meandering arrangement above the burner within the heating chamber, the heat transfer tube bundle having an inlet and an outlet which are respectively connected to lower portions of the rectifying column via transfer pipes.

Abstract: This invention relates to an absorption type heat exchanging apparatus having an evaporation unit, an absorption unit, a condensation unit and a regeneration unit. A diluted absorption liquid transfer pipe and a concentrated absorption liquid transfer pipe are installed between the absorption and regeneration units. A pump placed in one of these pipes is connected to a power take-off device which is placed in the other pipe and which is adapted to have rotative driving power imparted thereto by the absorption liquid in the pipe. Rotative driving power is imparted to the power take-off device by the energy based on the difference between the pressures in the regeneration and absorption units. This rotative driving power is transmitted to the pump. Thereby, the power to be provided to the pump from the outside is reduced.

Abstract: An absorption-type heat pump includes an evaporator 1, an absorber 7, a regenerator 12, and a condenser 17. In the evaporator 1, water 4 as a refrigerant is flash-evaporated through a flash evaporating device 2. The water vapor 6 from the evaporator 1 is absorbed into an absorbent consisting of an aqueous lithium bromide solution in the absorber 7, so that a heat carrier fluid 8 is heated by the heat of absorption evolved within the absorber. In the regenerator 12, the diluted absorbent 9 received from the absorber 7 is heated with a heating fluid 13, whereby the absorbed water content of the absorbent 9 is evaporated. The concentrated absorbent 14 resulting from the step of regeneration is returned to the absorber 7, while the water vapor 16 evolved in the regenerator 12 is introduced into the condenser 17. The heat carrier fluid 8, which has been heated in the absorber 7, is passed through the condenser 17, being further heated by the heat of condensation within the condenser 17.

Abstract: An absorption refrigeration system includes an evaporator 1, an absorber 6, a regenerator 9, and a condenser 13. In the evaporator 1, water as a refrigerant is caused to evaporate by depriving a chill carrier fluid 4 of its heat. The water vapor 5 from the evaporator 1 is absorbed into an absorbent consisting of an aqueous lithium bromide solution in the absorber 6, heat being generated thereby. The regenerator 9 receives the diluted absorbent 7 from the absorber 6 and heat same with a heating fluid 11 to evaporate the absorbed water from the absorbent. The concentrated absorbent 10 resulting from the step of regeneration is returned to the absorber 6, while the water vapor 12 generated in the regenerator 9 is introduced into the condenser 13. A supply of condensing water 14 is sprayed into the condenser 13 for direct contact with the incoming water vapor 12 to condense the latter.

Abstract: A multiple regeneration multiple absorption type heat pump having a multiple absorption system and a multiple regeneration system and adapted so that a refrigerant and an absorbent are circulated between the two systems and so that a fluid to be heated is passed therethrough the multiple absorption system comprises an evaporator for evaporating the refrigerant by a heat from an external low-temperature heat source, at least one absorbing/evaporating unit for allowing the absorbent to absorb the refrigerant vapor from the evaporator or a preceding similar absorbing/evaporating unit and for evaporating the refrigerant by the heat of absorption, and an absorber for allowing the absorbent to absorb the refrigerant vapor from the or a preceding absorbing/evaporating unit and for heating the to-be-heated fluid by the heat of absorption.