Heating apparatus and image forming apparatus having the same
AssigneeBrother Kogyo Kabushiki Kaisha
InventorsTsuyoshi MARUYAMA, Katsumi INUKAI
Life of this patent
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Abstract
A heating apparatus includes a switching circuit configured to switch on/off current-feeding from an AC power source to the heater, a temperature detector configured to detect a temperature of the heater, and a current-feed controller configured to execute a first current-feed mode of changing a current-feed ratio of current-feeding time to unit time by controlling switching of the switching circuit so that the temperature detected by the temperature detector falls within a target range. The current-feed controller executes a second current-feed mode of fixing the current-feed ratio to almost 100% or almost 0% during execution of the first current-feed mode in place of the first current-feed mode.
Claims19
A heating apparatus comprising:
- a heater;
- a switching circuit configured to switch on/off current-feeding from an AC power source to the heater;
- a temperature detector configured to detect a temperature of the heater;
- and
- a current-feed controller configured to execute a first current-feed mode of changing a current-feed ratio of current-feeding time to unit time by controlling switching of the switching circuit so that the temperature detected by the temperature detector falls within a target range, wherein
- the current-feed controller executes a second current-feed mode of fixing the current-feed ratio to almost 100% or almost 0% during execution of the first current-feed mode in place of the first current-feed mode.
Dependencies are inferred from the claim text.