CPC B60N 2/5678 (2013.01) [G05B 13/041 (2013.01); H05B 1/0238 (2013.01); H05B 3/16 (2013.01); H05B 3/34 (2013.01); H05B 2203/029 (2013.01)] | 10 Claims |
1. A seat heater comprising:
a heater that is provided between a seat cushioning material and a seat trim cover and comprises a heating wire laid on a base material;
a temperature detection unit provided on the base material and in the vicinity of the heating wire of the heater, the temperature detection unit comprising a thermistor being positioned apart from where a seat occupant comes in contact with the seat; and
a temperature control unit configured to control a temperature of the heater so that it approaches a target temperature in accordance with a temperature detected by the temperature detection unit, wherein
the temperature control unit starts heating the heater at a target temperature corresponding to an initial temperature detected by the temperature detection unit at a start of heating the heater, calculates an estimated environmental temperature, which is an estimated value of a temperature around the temperature detection unit, based on a rate of increase of a temperature indicating an amount of change of the temperature detected by the temperature detection unit in a period after an elapse of a predetermined time from a start of heating the heater, and corrects the target temperature so that it becomes lower as the estimated environmental temperature becomes lower.
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