An air blowing cooling mechanism includes a duct provided with an air blowing port, a fan configured to blow air toward the air blowing port, a first louver portion provided inside the duct, a shutter member, and a second louver portion provided downstream of the shutter member with respect to an air blowing direction of the fan. With respect to the air blowing direction, the fan, the first louver portion, the shutter member, the second louver portion and the rotatable heating member are disposed in a named order.