Capacity varying indirect type flue-cured tobacco hot wind furnace

The utility model relates to a capacity varying hot wind furnace, in particular to a capacity varying indirect type flue-cured tobacco hot wind furnace supplying heat according to needs, and belongs to the technical field of tobacco curing equipment. The capacity varying indirect type flue-cured tobacco hot wind furnace is composed of a furnace body, a dividing wall type heat exchanger, a chimney and a positive pressure combustion fan. The dividing wall type heat exchanger is arranged above the furnace body, the chimney is located on one side of the top end of the furnace body, and the positive pressure combustion fan is communicated with the furnace body through a pipeline. The furnace body is composed of an ash pit, a hearth, a hearth volume control mechanism, an ash cleaning door, a coal charging door, a burning-out chamber and a furnace bar. The furnace bar is located in the furnace body and divides the furnace body, the hearth is above the furnace bar, the ash pit is below the furnace bar, the burning-ou