PURPOSE: To protect a circulating pump by not receiving an operation of an operation switch in the case a water level sensor operates and a water level is below a set value by connecting a suction opening and an exhaust opening of a bath hot water circulating passage to a bathtub, providing the circulating pump on the way of the passage, and providing a control part which can exhaust bath hot water in which bubbles are mixed into the bathtub through the exhaust opening.
CONSTITUTION: A bath hot water suction pipe 10 allows a circulating pump P to suck bath hot water by bringing one end to communicating connection to a suction port 1m opened in the lower part of a bathtub body 1, and allowing the other end to communicate with a suction port of the circulating pump P. As for a bath hot water force-feeding pipe 11, one end is allowed to communicate with a water discharge port of the circulating pump P, and the other end is brought to communicating connection to injection nozzles 2, 3 and 4, respectively. Also, on the middle part of the bath hot water force-feeding pipe 11, a pressure detecting sensor 48 doubling as a water level detecting sensor for detecting the pressure of bath hot water force-fed in the pipe 11 is attached and a result of detection from the sensor is sent to a control part C and by the control part C, injection pressure of bath hot water injected from each injection nozzle 2, 3 and 4 is controlled by varying the speed of revolution of a pump driving motor M and the opening/closing quantity of an injection quantity adjusting valve body 22 of each injection nozzle 2, 3 and 4.
INATOMI YASUTOSHI
OBATA TAKASHI
HASHIDA MITSUAKI
UCHIYAMA KOICHI
MORIYAMA KENJI
