| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an efficient water heater power managing device by effecting control of switching at zero cross by frequency information of a power when a plurality of water heaters must be controlled and by distributing a power, in control of a heater power used in the water heater. SOLUTION: A plurality of the water heaters are interconnected through a network, and the zero cross timing of a power frequency is measured by a network-connected centralized managing device. The water heater power managing device is provided to perform distribution of a power through switching control at zero cross, regarding a power to each water heater.</p> |
