| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a water heater capable of eliminating the error caused by conducting drift of a water level sensor and precisely determining the water level of a bathtub. <P>SOLUTION: The water level La of the bathtub 4 is determined based on the sensor measuring water level Ld measured by a water level sensor Sa and a predetermined reference water level L0 when a reference supplying quantity Q0 of hot water is supplied to the bathtub 4 in the water heater A, the water level is obtained based on an equation of La=Ld+Lc, here Lc is a value for correcting the conducting drift and is obtained using the value relating to a sensor measuring water level Ld and a correcting coefficient K (Lc=0, when Lc≥0 and Lc<0), an estimated temporary value Le of the bathtub water level preliminarily obtained based on the sensor measuring water level Ld when obtaining Lc, the first correcting coefficient K1 is used when L0≥Le, and the second correcting coefficient K2 is used when L0<Le as a correcting value K, the relation K1>K2 is satisfied. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
