Heating control apparatus by humidity detection

摘要

A heating control apparatus in microwave ovens controls heating of food by detecting water vapor generated by heating a food to sense a varying relative humidity by a humidity sensor and determining a critical point of the heating condition of the food by detecting a time point when the relative humidity rises from a minimum value beyond a predetermined threshold value thereby to determine a proper total heating time of the food. To allow accurate humidity sensing, a cleaning device is provided in proximity to the humidity sensor such that the cleaning device is actuated for an appropriate time period at a proper timing to insure proper performance of the humidity sensor.