Induction cooking heater

Details Induction cooking heater Induction cooking heater

2006-09-05

2006-09-05

Leung, Philip H. (Department: 3742)

Electric heating

Inductive heating

With heat exchange

C219S626000, C219S667000, C219S494000, C099S325000

Reexamination Certificate

active

07102109

ABSTRACT:
An induction heating cooker includes a surface, a heating coil for inductionally-heating a load pan, an inverter for supplying a high-frequency current to the heating coil, an infrared detector which detects infrared radiation emitted from the load pan and is located under a top plate, a first temperature detector for detecting a temperature of the load pan based on an output of the infrared detector, a heating controller for controlling a power output from the inverter, a thermo-sensitive element for receiving heat from the top plate, and a second temperature detector for detecting a temperature of the load pan based on an output of the first thermo-sensitive element. This induction heating cooker detects a temperature change of the load pan accurately by detecting an infrared radiation from the load pan, and detects the temperature of the load pan by the heat conduction from the pan even if ambient light enters.

REFERENCES:
patent: 3781504 (1973-12-01), Harnden, Jr.
patent: 3-208288 (1991-09-01), None
patent: 5-174960 (1993-07-01), None
patent: 2002-299029 (2002-10-01), None
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patent: 2004-139894 (2004-05-01), None
patent: 2004-273302 (2004-09-01), None
International Search Report corresponding to application No. PCT/JP2004/016358 dated Jan. 25, 2005.
Form PCT/ISA/210.

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