Patent ID: 8761627
Filing Date: 2014-06-24
Classification: G03G,H05B

Abstract:
1. A heating apparatus comprising: a heater; a current-feed switching circuit configured to switch turning-on/off of current-feeding from an AC power source to the heater, thereby feeding current from the AC power source to the heater at a current-feed ratio, the current-feed switching circuit being further configured to perform ON lock current-feed control in which a current-feed ratio is fixed to almost 100%, OFF lock current-feed control in which the current-feed ratio is fixed to almost 0%, and predetermined current-feed control in which the current is fed at a predetermined current-feed ratio that is different from almost 100% and almost 0%; a temperature detector configured to detect a heating temperature of the heater; and a current-feed controller configured to control the current-feed ratio of the current-feed switching circuit such that the detection temperature of the temperature detector is within a target range, the current-feed controller being further configured to perform the ON lock current-feed control for a first period, the OFF lock current-feed control for a second period, and the predetermined current-feed control for a third period, such that each of the ON lock current-feed control, the OFF lock current-feed control, and the predetermined current-feed control is performed at least once, each at a different timing, within a predetermined control period.