Cooking oven having function to automatically clean soils attached to inner walls thereof.

摘要

A self-cleaning type cooking oven with a cooking chamber (1) which has a function to pyrolytically eliminate food soils (15) accumulated on walls (2, 3) of the cooking chamber (1). The cooking oven includes a heater (4, 5) for supplying heat into the cooking chamber (1) so as to allow to pyrolytically degrade the food soils (5) and an exhausting passage (6) coupled to the cooking chamber (1) to exhaust gases (16) generated due to the pyrolytical degradation to an ambient atmosphere. In the exhausting passage (6) is provided an oxidizing catalyst (7) which oxidizes the gases (16) introduced thereinto for exhausting and also provided a gas sensor (8) to detect a gas component therearound. Also included in the cooking oven is a heat control unit (9) electrically connected to the heater for controlling heat supply into the cooking chamber, the heat control unit (9) being responsive to a gas signal therefrom to determine a heating time preiod for chamber cleaning. With the temperature of the cooking chamber being kept at a predetermined cleaning temperature, the heat control unit samples the gas signal at a given time interval to detect a variation of amount of the gas component and detect an inflection point from decresing to increasing or vice versa in the gas-component variation to determine the heating time period in conjunction with the inflection point, the food soils being substantially degraded by heating during the heating time period.