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针对现场应用的无热再生干燥器控制柜存在的问题进行了分析，指出了由机械式继电器和时间继电器构成的控制系统所存在的弊病，从而设计了一套单片机控制系统，利用该系统的８１５５输出口控制无热再生干燥器的５个电磁阀的切换，由于８１５５输出口送出的控制信号驱动能力不强，所以中间加有７４ＬＳ０６驱动电路驱动固态继电器，固态继电器的输出接２２０Ｖ电磁阀，从而控制２个干燥器自动切换。定时时钟是利用单片机的定时器产生的
According to the problems existing in the control cabinet of heatless regenerative dryer applied in the field, the disadvantages existing in the control system composed of mechanical relay and time relay are pointed out, and a set of control system of single chip microcomputer is designed. Using the system 8155 Output control No heat regenerative dryer 5 solenoid valve switch, because the 8155 output control signal sent out the ability to drive is not strong, so the middle plus 74LS06 drive circuit to drive the solid state relay, the solid state relay output connected to the 220V solenoid valve so that Control 2 dryers automatically switch. Timing clock is the use of single-chip timer generated