| 摘要 |
PURPOSE:To keep aloof from becoming habituated to the temperature sensed during taking bath and consequently enable to take an agreeable bath by a method wherein the power spectra of the rotational frequency of the pump equipped on a forced circulation type bath boiler is constituted so as to be able to damp in proportion to the frequency of change of rotational frequency of the pump at taking bath. CONSTITUTION:A heat exchanger 2 provided in the bath unit absorbs heat from a burner 4 arranged beneath the heat exchanger 2 in order to heat the water in the heat exchanger 2 and said heated water is discharged through a discharge pipe 7 into a bathtub 5. On the other hand, the water in the bathtub 5 is flowed through a suction pipe into the heat exchanger 2 and forcibly circulated by means of a pump 3 interposed in the suction pipe 6. At this time, with the start of the pump 3, signals are sent from an inverse-frequency signal generator 11 to a pump controlling circuit 10, which changes the rotational frequency of the pump 3, so as to control the power spectra of the rotational frequency of the pump 3 inversely proportional to the period of change of the rotational frequency of the pump 3. Consequently, the jet stream of hot water striking a human body 12 is changed, resulting in enabling to take an agreeable bath. |
