| 摘要 |
PURPOSE:To achieve a comfortable air conditioning by controlling the rotational frequency of a blower with a power spectrum adversely proportional to the frequency at a time interval determined by a signal adversely proportional to the frequency. CONSTITUTION:A manually setting circuit 12 for generating constant signal without time variation and a signal generation circuit 9 are connected to a control circuit 11 of a blower 3 through a changeover switch 8. A time L1 for switching to the position of the manually setting circuit 12 is determined with a timer circuit 7 receiving a signal from a signal generation circuit 10. The signal generation circuits 9 and 10 generate an output signal whose frequency varies with the time making the power spectrum adversely proportional to the frequency. Thus, the rotational frequency of the blower 3 is controlled with the power spectrum adversely proportional to the frequency at an interval of a varying time L1. |
