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许多电器装置往往需要一个时间程序控制对其进行控制才触发挥最佳效能,《电子制作》今年第8期介绍的多用分段定时器就是一个十分适用的时间控制器。它使用方便、设置简单、价格便宜、用途广泛。笔者将其用在办公室空调系统的排气风扇控制电路中,取得了很好的效果。空调房间内为了保持空气清新,使长时间在内工作的人员不得“空调病”,必须适时输进新鲜空气。附图便是这种排气系统的电气控制图。定时器TP设为2个小时一个分段,前1.5小时为关。1.5小时后,TP的触点TPC吸合,电流通过接触器JC1的常闭触头JZ1-4使接触器JC2吸合,排气风扇FN2转动。与
Many electrical devices often require a time program control to trigger the best performance of their play, “Electronic Production” introduced this year, Section 8 multi-purpose timer is a very useful time controller. It is easy to use, set up simple, cheap, versatile. I will use it in the office air conditioning system exhaust fan control circuit, and achieved good results. In order to keep the air fresh in the air-conditioned room, the staff working for a long time may not be “air-conditioned sick”, and the fresh air must be input timely. The figure is the electrical control diagram of this exhaust system. Timer TP set to 2 hours a sub-paragraph, the first 1.5 hours off. After 1.5 hours, the contact TPC of the TP is closed and the current is drawn into the contactor JC2 through the normally closed contact JZ1-4 of the contactor JC1, so that the exhaust fan FN2 rotates. versus