| 摘要 |
PROBLEM TO BE SOLVED: To provide a demand monitoring and controlling device capable of automatically performing the jobs from the monitoring of a demand up to the control of a plurality of air conditioners in order to save electric power efficiently. SOLUTION: In a demand monitoring and controlling device whose CPU 13 is connected to a pulse detector 201 which detects pulses to be outputted from a pulse oscillator 200 of an electric power company, and a switching function for the on-off control of a plurality of air conditioners No. 1 to No. 8, the CPU 13 calculates a predicted power R0 and a second target power P2 from the present power P corresponding to the number of pulses per a certain time at an initial stage. Then, after setting the smaller one of the second target power P2 and monthly target power P1 to reference power P0 , the CPU 13 again calculates predicted power R from the present power P. If the predicted power R exceeds the reference power P0 , a signal is transmitted to switch off one of the air conditioners and restart it in t seconds. If predicted power calculated next exceeds the reference power, the control is repeated of transmitting a signal for sequentially switching off an air conditioner next to the switched-off air conditioner and restarting it until the predicted power becomes equal to or lower than the reference power. |
