| 摘要 |
PROBLEM TO BE SOLVED: To provide a bath hot water supplier which can hold down both he failure factor and the manufacture cost while achieving the fail of water to a bathtub in a short time. SOLUTION: The middle of a fall duct to a bathtub 3 is bifurcated into two systems, and in one brunch duct 20, a hot water supply solenoid valve 10 to open and close the duct, a flow sensor 12 for measurement of quantity of fall, and a bath heat exchanger 5 are arranged, and in the other brunch duct 30, only the hot water supply solenoid valve 10 to open and close the duct is arranged. Furthermore, in the fall duct 7, a hot water supply unit 1 to supply hot water at a specified temperature is arranged, and the hot water supply unit 1 possesses a quantity-of-entry-water sensor 2 for detection of the quantity of entry water, and the relation formula between the detected quantity B of the flow sensor 12 for detection of the quantity of fall and the flow C of passage of the brunch duct 30 not provided with a flow sensor 12 for detection of fall quantity is obtained from the relation formula between the relation formula between the detected quantity A of the entry water sensor 2 and the detected quantity B of the flow sensor 12 for detection of the fall quantity, and it is stored in a controller 3, and thereafter the quantity D of the fail at large is detected by the detected flow B of the flow sensor 12 for detection of the fall quantity.
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