| 摘要 |
PURPOSE:To perform intermittent operation suitable to an equipment to be controlled by providing for control an on-time setter and an off-time setter which set the on-time and off-time of a refrigerator respectively. CONSTITUTION:The prescribed-period pulse signal of a reference signal generator 1 is counted by an on-time counter 2 and an off-time counter 3 respectively and when their count values go to the set values of count value setters 8 and 10 which correspond to times set by an on-time setter 7 and an off-time setter 9, an output signal is outputted to a self-holding device 4. When the count value of the counter 3 goes to the set off-time, its output is inputted to the set terminal of the device 4, whose Q output is set to a 1 and a relay 6 is energized via a relay driver 5 to make a contact 6a, thereby putting a refrigerator in operation. Simultaneously, the device 3 is reset to stop counting. While the Q output of the device 4 is the 1, the Q' output is a 0, so the device 2 keeps on counting pulses. As its count value goes to its set value, the device 4 is reset by the output signal of the device 2 to make the Q output a 0 and while the contact 6a is made, the counting of the device 2 is stopped. |
