SEAT HEATING APPARATUS

PROBLEM TO BE SOLVED: To reduce the area of an electric heater installed in a conventional type of seat to reduce cost and to preserve usual warm feeling as much as possible by providing heating means arranged in a seat part and control means for regulating the heating means. SOLUTION: A back face part C is not provided with an electric heater 1 arranged only in a seat part D. In this case, the adopted heater 1 having resistivity of 2Ω/m is fabricated from NiCr alloy line containing approximately 80% Ni. The surface temperature of a portion B contacted with a thigh part is higher than that of the remaining portion of the seat part D. For this purpose, the portion B has a pitch of about 2cm, and a portion A contacted with a buttock part has a pitch of about 4cm. A vehicle battery of 12V is used as power supply, and the setting temperature (switching temperature of a thermostat) is 35 deg.C at the buttock part, and is 37 deg.C at the thigh part. A temperature control means 10 controls the heater 1 to acquire the setting temperature, thereby effectively recreating usual warm feeling in the seat. Moreover, manufacturing cost can be nearly halved to realize a low price.