Abstract: Even when the efficiency of a low temperature heat exchanger is raised to reduce the required heat capacity inputting to the absorption refrigerating machine and the temperature of cooling water supplied to an absorber falls suddenly as it is, and thereby the temperature of a diluted absorbent solution falls suddenly, an absorption refrigerating machine without abnormally increasing the temperature of the concentrated absorbent solution and crystallizing the solution is disclosed. A heat recovery device 8 is provided between a low temperature heat exchanger 6 and a high temperature heat exchanger 7 of an absorbent solution pipe 13 for connecting a high temperature regenerator 1 and an absorber 5 with the low temperature heat exchanger 6, the high temperature heat exchanger 7 and an absorbent solution pump 14 therebetween. Further, the heat recovery device 9 is provided between the low temperature heat exchanger 6 and the absorbent solution pump 14.

Abstract: Even when the efficiency of a low temperature heat exchanger is raised to reduce the required heat capacity inputting to the absorption refrigerating machine and the temperature of cooling water supplied to an absorber falls suddenly as it is, and thereby the temperature of a diluted absorbent solution falls suddenly, an absorption refrigerating machine without abnormally increasing the temperature of the concentrated absorbent solution and crystallizing the solution is disclosed. A heat recovery device 8 is provided between a low temperature heat exchanger 6 and a high temperature heat exchanger 7 of an absorbent solution pipe 13 for connecting a high temperature regenerator 1 and an absorber 5 with the low temperature heat exchanger 6, the high temperature heat exchanger 7 and an absorbent solution pump 14 therebetween. Further, the heat recovery device 9 is provided between the low temperature heat exchanger 6 and the absorbent solution pump 14.

Abstract: A dual heat source high-temperature regenerator to solve problems involved in two types of conventional high-temperature regenerators for carrying out heating by using a dedicated burner as the heat source and by using exhaust gas supplied from outside systems as the heat source; namely, the former type has a problem of higher running costs, and the latter a problem of narrower ranges for capacity control. The dual heat source high-temperature regenerator arranges two inner shells and inside an outer shell to form combustion and exhaust gas flues, respectively. The combustion gas flue has a sideways U shape as a whole. The lower end is equipped with a burner, and the upper end connected to an exhaust duct. The exhaust gas flue 62 has a horizontal, straight shape as a whole. One end is provided with an exhaust gas inlet, and the other end connected to an exhaust duct.