Regenerator for use in ammonia absorption refrigerator

A regenerator for use in an ammonia absorption refrigerator, the regenerator comprising 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 disposed in a lower portion of the heating chamber, and a heat transfer tube bundle provided in a meandering tube 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;
• and
• the rectifying column has a gas-liquid separation space provided in a lower portion of a column body for separating ammonia from the ammonia aqueous solution, and first and second pooling chambers separated by a partition wall of a predetermined height provided on the bottom of the column body, in order that an ammonia aqueous solution pooled in the first pooling chamber is introduced into the heating chamber via one of the transfer pipes and the ammonia aqueous solution heated in the heater is introduced into the gas-liquid separation space above the second pooling chamber via the other transfer pipe, the rectifying column further having a baffle plate provided in the column body for guiding downward into the second pooling chamber the heated ammonia aqueous solution supplied into the gas-liquid separation space via the other transfer pipe.