Absorption refrigerating unit and shell and tube type generator thereof

The utility model discloses an absorption refrigerating unit and a shell and tube type generator thereof. The shell and tube type generator comprises a tube pass and a shell pass. Heat transfer tubes at the turning points of airflow of every two adjacent flow paths in the tube pass are communicated through a turning steam chamber, the turning steam chamber is communicated with a condenser tube of the tube pass through a drain tube, and accordingly condensate water in the turning steam chamber can be drained through the drain tube and the condenser tube. Compared with the prior art, the siphon principle is used in the shell and tube type generator, the condensate water generated by heat release of high-temperature steam in the former flow path of the tube pass of the shell and tube type generator can be drained to flow out in time through the drain tube and the condenser tube, the heat transfer area of the heat transfer tubes in the later flow path is not occupied any more, the heat transfer area of the heat transfer tubes in the generator can be fully utilized, and therefore the heat transfer effect of the generator can be improved.