Patent ID: 6748762
Filing Date: 2004-06-15
Classification: F25B,Y02A,Y02B,Y02P

Abstract:
An absorption-refrigerator comprising a hot regenerator for evaporating and separating a coolant by heating and boiling by a combustion apparatus and obtaining a coolant vapor and an intermediate absorption liquid from a diluted absorption liquid, a cold regenerator for heating the intermediate absorption liquid generated and supplied by said hot regenerator with the coolant vapor generated by the hot regenerator for evaporating and separating the coolant furthermore, and obtaining a coolant vapor and a dense absorption liquid from the obtained intermediate absorption liquid, a condenser for being supplied with a coolant liquid condensed by heating the intermediate absorption liquid in said cold regenerator and, at the same time, obtaining a coolant liquid by cooling the coolant vapor generated and supplied by said cold regenerator, an evaporator for evaporating the coolant by cooling a fluid flowing in a heat exchange tube on which the coolant liquid supplied from said condenser is spread, an absorber for making a diluted absorption liquid by absorbing the coolant vapor generated and supplied through said evaporator in the dense absorption liquid supplied by separating the coolant vapor from the cold regenerator and supplying the hot regeneration with the same, a cold heat exchanger where the diluted absorption liquid and the dense absorption liquid flowing in and out said absorber exchange heat, and a hot heat exchanger where the intermediate absorption liquid and the diluted absorption liquid flowing in and out said hot regenerator, wherein:said absorption-refrigerator comprised a first heat recovery system where exhaust gas discharged from the combustion apparatus and the diluted absorption liquid having passed through the hot heat exchanger exchange heat, a second heat recovery system where the exhaust gas having passed through said first heat recovery system and the diluted absorption liquid, having passed through the low heat exchanger before entering the hot heat exchanger exchange heat, an exhaust pipe or absorption liquid pipe bypassing said second heat recovery system, a valve provided in the exhaust pipe or absorption liquid pipe bypassing the second heat recovery system, and a control means for controlling the opening/closing of said valve based on the exhaust gas temperature.