Patent ID: 8406648

Claim:
A heating device for heating a rotary heated member that rotates in a predetermined direction of rotation, the heating device comprising: a heater facing the rotary heated member without contacting the rotary heated member to heat the rotary heated member; and a temperature detector facing the rotary heated member via the heater to detect a temperature of the rotary heated member, the heater comprising: a housing provided between the temperature detector and the rotary heated member; a through-hole provided in the housing, via which the temperature detector faces the rotary heated member; and a channel provided in the housing at a position downstream from the through-hole in the direction of rotation of the rotary heated member, through which an air current generated in a gap between the heater and the rotary heated member moves, the channel having a hollow cross-sectional area greater than a hollow cross-sectional area of the through-hole.