Longan drying box with internal circulation drying function

The invention relates to the field of drying equipment, in particular to a longan drying box with internal circulation drying, which comprises a drying box body, an air duct and a breathable plate, first isolation plates capable of sliding left and right are mounted in the drying box body, two adjacent first isolation plates are arranged in a staggered manner, and the air duct is fixedly connected to the back surface of the drying box body; a heating mechanism is installed in one end of the air channel and located on one side of the drying box body, an internal and external circulation adjusting mechanism is installed on the back face of the air channel, and a humidifying mechanism is installed at the bottom of one end of the air channel. Internal circulation is changed into external circulation through the internal and external circulation adjusting mechanism, humid gas in the drying box body is exhausted, so that the interior of the drying box body is kept dry, drying gas in the drying box body returns to t