| 摘要 |
PROBLEM TO BE SOLVED: To secure the safety of a warm air heater and to reduce the standby power of the furnace. SOLUTION: This warm air heater is provided with a plurality of input circuits which input electric power from a commercial power source to a power transformer 2 in parallel with each other. One of the input circuits is exclusively used for the power supply to a microcomputer and the other is exclusively used for the power supply to the driving circuit and displaying section of the heater. At standby time, in addition, the power supply to the driving circuit and displaying section is broken by means of a breaking circuit 29 so as to reduce the core loss caused by the transformer 20. |
