| 摘要 |
PURPOSE:To make a convenient manner of use of a hot air heater for feet by a method wherein a room temperature is sensed and the desired temperature in a hot air heater is varied in response to the room temperature. CONSTITUTION:A temperature (t) in a hot air heater is inputted to an input circuit 12 from a temperature sensing circuit 14 through input terminal 21 of a microcomputer 8 and A/D converter 9. In turn, the room temperature 16 is inputted to the microcomputer 8 and then the desired temperature T1 of hot air heater of a hot air heater setting circuit 18 is sequentially corrected to T2 in response to the room tempeature. This corrected setting temperature T2 is inputted to the microcomputer 8, compared with a measured hot air heater temperature (t) and then reached to the desired temperature, at this time an output terminal 24 of the microcomputer becomes Low and a transistor 26 is turned off, bidirectional thyristor 28 becomes nonconductive and then the heating of the hot air heater is stopped. With this arrangement, it is not necessary to vary the predetermined temperature of hot air heater in response to the variation in room temperature, resulting in that a convenient manner of operation of the hot air heater can be assured. |
