INDUCTION COOKING HEATER

摘要

An induction cooking heater comprising a top plate for mounting a load pan above the upper surface thereof and transmitting infrared rays, a coil for induction heating the load pan, an inverter for supplying the heating coil with a high frequency current, an element arranged below the lower surface of the top plate and detecting infrared rays being radiated from the load pan, a first temperature detector for detecting the temperature of the load pan based on the output from the infrared ray detecting element, a heating controller for controlling the output power from the inverter, a thermal element for receiving heat from the top plate, and a second temperature detector for detecting the temperature of the load pan based on the output from the thermal element. When a condition that the variation in temperature being detected by the first temperature detector within a specified time falls within a specified value is satisfied, the heating controller makes a decision that the temperature of the load pan is stabilized and controls the output power from the inverter based on the decision results. When the temperature being detected by the first temperature detector does not satisfy that condition, the heating controller makes a decision that the temperature of the load pan is stabilized based on the temperature being detected by the second temperature detector. In the induction cooking heater, temperature of the load pan can be detected accurately even if a disturbance light exists by detecting infrared rays being generated from the load pan.