PURPOSE: To miniaturize a bubble generating device by eliminating the driving device of a bubble generating pump and contrive to lower the noise and vibration and consequently to reduce the cost of a bath heater by a structure wherein an exhaust fan and the bubble generating pump are driven by a same device.
CONSTITUTION: A heat exchanger 3 for a bath heater, which is heated by a heating burner 4 and exchanges heat with water, and a bathtub 1 are communicated to each other by circulating pipes 2, to one of which a bubble generating pump 5 to generate bubbles in the bathtub 1 is communicated by a bubble generating pipe 7. Further, an exhaust fan 8 to discharge the exhaust gas generated at the burner 4 is driven by an exhaust fan driving device, which simultaneously drives the bubble generating pump 5. Because, as a result, the driving device of a bubble generating pump is eliminated, the bubble generating device is miniaturized and the lowering of the noise and vibration and consequently the reduction of the cost of a bath heater can be contrived.
UNO SHIGEKI
MATSUI KOUJI
