| 摘要 |
<p>PROBLEM TO BE SOLVED: To solve a problem of a conventionally proposed remote controller with the intercommunication system function in a hot-water feeder system for the voice communication between remote controllers that the wiring work is complicated because the wiring work is performed by separate communication lines exclusive for sound signals and for operation signals. SOLUTION: The hot-water feeder body has a detection circuit for detecting communication information signals, and the remote controller has a detection circuit for detecting communication information signals, a voice modulation circuit for modulating voice signals amplified through a microphone, a carrier frequency changing circuit for superposing a carrier wave on the oscillating frequency of the voice modulation circuit by a divided signal from a microcomputer, a voice demodulating circuit or demodulating the modulation from the other remote controller as a voice, and a communication SW for transmitting the divided signal of the divided changing circuit from the microcomputer.</p> |
