JP2007079293A5 - - Google Patents

Claims (9)

Enclosing a heating element which generates heat by using power supplied from a commercial power source, a fixing unit configured to fix the toner image on the transfer material by applying heat of the heating element to the transfer material to which the toner image has been formed An image forming apparatus having
Power limiting means for limiting power supplied from a commercial power source to the fixing means to a predetermined limit level;
Charge / discharge power storage means;
Control means for controlling power supply from the power storage means;
An image forming apparatus comprising: an adjusting unit configured to adjust the restriction level according to a control state by the control unit. The control means controls power supply from the power storage means to a load excluding the fixing means,
While the control means instructs the power supply from the power storage means to the load excluding the fixing means, the adjustment means sets the limit level of the power supplied to the fixing means to an amount corresponding to the power supply. The image forming apparatus according to claim 1, wherein the image forming apparatus is increased only by a predetermined amount.   The image forming apparatus according to claim 1, wherein the control unit supplies power from the power storage unit when heating of the fixing unit is started. It further has a print request presence / absence detecting means for detecting the presence / absence of a print request
The control unit controls power supplied to the chargeable / dischargeable power storage unit according to a detection result by the print request presence / absence detection unit at least when the power is turned on or when returning from the energy saving mode. The image forming apparatus according to claim 1.   The control means executes power supply to the chargeable / dischargeable power storage means when the print request presence / absence detecting means detects that there is no print request when the power is turned on or when returning from the energy saving mode. Item 5. The image forming apparatus according to Item 4.   When the control means detects a print request by the print request presence / absence detection means during power supply to the chargeable / dischargeable power storage means, the power supply to the chargeable / dischargeable power storage means is stopped. The image forming apparatus according to claim 4. A storage amount detecting means for detecting a storage amount of the storage means; and a temperature detecting means for detecting a temperature of the fixing means,
The control means includes
When the amount of electricity stored in the electricity storage means detected by the electricity storage amount detection means is greater than or equal to a predetermined amount, and when the temperature of the fixing means detected by the temperature detection means is less than a predetermined temperature, Supplying power to the load;
While supplying power from said storage means to the load, to monitor the temperature of the charged amount you and the fixing means of said storage means by repeating the detection by the storage amount detecting means and the temperature detecting means,
The power supply from the power storage unit to the load is cut off when a power storage amount of the power storage unit becomes less than the predetermined amount, or when the temperature of the fixing unit exceeds the predetermined temperature. An image forming apparatus according to any one of claims 1 to 6.   The image forming apparatus according to claim 1, wherein the fixing unit is an electromagnetic induction heating type fixing device.   8. The image forming apparatus according to claim 1, wherein the fixing unit is a ceramic sheet heater type fixing device.