Waste heat recovery device for carriage of power van

The utility model relates to the technical field of power supply vehicles, in particular to a waste heat recovery device for a power supply vehicle compartment, which comprises a compartment body, a water tank is arranged in the compartment body, a fixing frame is arranged on one side of the water tank, a fan is mounted in the fixing frame, a connecting pipe is arranged on one side of the fixing frame, and a through pipe is rotatably connected in the water tank. One end of the through pipe extends out of the water tank and is rotationally connected with the connecting pipe, multiple sets of heat dissipation plates are fixedly arranged on the outer side of the through pipe in the water tank, a first bevel gear is fixedly arranged on the outer side of one end of the through pipe, a motor is installed at the top of the water tank, and the output end of the motor is connected with a second bevel gear meshed with the first bevel gear; the heat dissipation plate makes full contact with water, meanwhile, the flowabi