Lithium bromide absorption type refrigerating unit driven by waste heat of internal combustion engine and control method

The invention provides a lithium bromide absorption type refrigerating unit driven by waste heat of an internal combustion engine and a control method, and belongs to the technical field of waste heatrecovery and refrigeration. The refrigerating unit comprises the internal combustion engine and a cylinder sleeve heat exchanger connected with the internal combustion engine, wherein the internal combustion engine is connected with a flue gas heat exchanger; the refrigerating unit further comprises a condensation generator and an evaporation absorber, wherein the condensation generator comprisesa generator body with a first heat exchange coil pipe; the cylinder sleeve heat exchanger is connected with the flue gas heat exchanger through a first electromagnetic valve, the flue gas heat exchanger is connected with the first heat exchange coil pipe, and the first heat exchange coil pipe is connected with the cylinder sleeve heat exchanger through a second electromagnetic valve; and the evaporation absorber is partit