| 摘要 |
PURPOSE:To prevent the accumulation of fur in a heat exchanger, by operating a control part for controlling an ultrasonic wave generating part and a combustion part by a remote operation part. CONSTITUTION:A bathtub 1 and a bath boiler 2 are connected by a connection pipe 3 to guide the water in the bathtub 1 to a heat exchanger 4. An ultrasonic wave generating part 10 is mounted to the water entry part 4a of the heat exchanger 4 and operated by the switch 7a of a remote operation part 7 through the ultrasonic oscillation circuit of a control circuit part 6. By this constitution, an ultrasonic wave is emitted toward the heat exchanger 4 from the ultrasonic wave generating part 10 an the heat exchanger 4 is vibrated to remove fur. At the detachment point of time, a bathtub plug 8 is pulled off to drain water. By this method, the accumulation of fur in the bathtub can be prevented.
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