Internal circulation heating system in stator winding paint curing furnace

The invention discloses an internal circulation heating system in a stator winding paint curing furnace. A stator winding paint curing furnace includes a curing chamber; a stator is placed in the curing chamber; the internal circulation heating system includes a heater; one side of the curing chamber is provided with an air intake chamber, and the other side of the curing chamber is provided withan air return chamber; the air intake chamber and the curing chamber are separated by a porous mesh plate and the air return chamber and the curing chamber are also separated by a porous mesh plate; the upper part of the curing chamber is provided with a heating chamber; the heater heats gas circulated in the heating chamber; a fan is arranged between the heating chamber and the air return chamber; the air inlet of the fan communicates with the air return chamber, and the air outlet of the fan communicates with the heating chamber; and the heating chamber communicates with the air intake chamber. The internal circulat