Abstract: A haircare apparatus includes a blower fan (6), a heater (5), an ion generator (7) that is capable of generating positive ions which are H+(H2O)m (m is any natural number) and negative ions which are O2?(H2O)n (n is any natural number), an actuator (21) that is for selecting operation of a penetrating mode that promotes penetration of the positive ions and the negative ions generated by the ion generator (7) into hair, and a control unit (22) that controls the heater (5) such that a temperature of air blown out from an air outlet (11) becomes a predetermined promotion temperature at which penetration of moisture accompanying the positive ions and the negative ions generated by the ion generator (7) into the hair is promoted while driving the ion generator (7) and the blower device (6).

Abstract: A humidity detecting circuit for detecting the ambient humidity in a cooking chamber, which includes a constant current source, a first temperature-detecting resistor self-heated by the constant current source to detect the ambient humidity and having one terminal connected to an output terminal of the constant current source, and a second temperature-detecting resistor having one terminal connected to the one terminal of the first temperature-detecting resistor to detect the ambient temperature. An operational amplifier having an inverting input terminal, a noninverting input terminal and an output terminal is provided, the inverting input terminal being connected to the other terminal of the second temperature-detecting resistor so that the terminal voltage of the first temperature-detecting resistor may be inputted into the inverting input terminal through the second temperature-detecting resistor.