US 12,292,709 B2
Temperature control device and image forming apparatus including the temperature control device
Takeshi Kojima, Tagata Shizuoka (JP)
Assigned to TOSHIBA TEC KABUSHIKI KAISHA, Tokyo (JP)
Filed by TOSHIBA TEC KABUSHIKI KAISHA, Tokyo (JP)
Filed on Nov. 14, 2023, as Appl. No. 18/508,278.
Application 18/508,278 is a continuation of application No. 18/071,684, filed on Nov. 30, 2022, granted, now 11,852,997.
Claims priority of application No. 2022-001105 (JP), filed on Jan. 6, 2022.
Prior Publication US 2024/0077821 A1, Mar. 7, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G03G 15/00 (2006.01); G03G 15/20 (2006.01)
CPC G03G 15/55 (2013.01) [G03G 15/2039 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A temperature control device configured to supply power to a heater of a fixing device, thereby controlling a temperature control target to which heat is propagated from the heater so as to reach a target temperature, comprising:
a heater power supply circuit configured to supply power to the heater;
a temperature sensor configured to measure a detected temperature from the temperature control target;
a temperature estimation circuit configured to estimate an estimated temperature value of the temperature control target by the detected temperature;
a control signal generation circuit configured to output a control signal for controlling the power supplied by the heater power supply circuit based on the estimated temperature value of the temperature control target estimated by the temperature estimation circuit and the target temperature; and
a temperature abnormality detection circuit configured to determine whether an abnormality exists in the temperature sensor or on a circuit side based on a comparison result of the detected temperature acquired by the temperature sensor and the estimated temperature value.