| 摘要 |
PROBLEM TO BE SOLVED: To enable correction of the output of a pressure sensor to be easily carried out and shorten the time required to perform automatic hot water feeding operation. SOLUTION: In a combined hot water feeder comprised of a hot water feeding circuit 10 for heating fed water and supplying hot water, a circulation circuit 20 for circulating water in a bath tub and heating it and a hot water feeding circuit 30 for use in connecting the hot water feeding circuit 10 to the circulation circuit 20, a first valve S1 opened when the hot water is fed, a hopper 32 capable of releasing the hot water feeding circuit 30 to the surrounding atmosphere, a second valve S2, a pressure sensor 33 and a third valve S3 are arranged in series from the hot water supplying circuit within the hot water feeding circuit. There is provided a control section 40 for opening the first, second and third valves when hot water is fed to a bath tube 43, closing the first and third valves and opening the second valve when the pressure sensor is corrected, releasing the hopper to the surrounding atmosphere and sensing an output of the pressure sensor 33. |
