Image forming apparatus that uses either a heater or frictional heating to heat and dry a surface of a photoconductive drum based on the detected ambient temperature and humidity

摘要

An image forming apparatus includes a slidingly-rubbing roller abutting a surface of a photoconductive drum; a temperature detection section; a humidity detection section; and a heating control section. When the humidity detected by the humidity detection section is equal to or higher than a first threshold humidity and the temperature detected by the temperature detection section is equal to or higher than a threshold temperature, the heating control section heats and dries the surface of the photoconductive drum by a heat generator, while in a case when the humidity is equal to or higher than the first threshold humidity and the temperature is less than the threshold temperature, the heating control section polishes the surface of the photoconductive drum by the slindingly-rubbing roller with a polishing agent contained in a toner and heats and dries the drum surface by frictional heat generated from the polishing.