| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve hot water temperature control and heating speed to improve usability by supplying a target combustion amount in the shortest time by the optimum opening/closing control of a gas selector valve. <P>SOLUTION: This gas water heater comprises a heat exchanger 15, the gas selector valve 9, and a switching selecting means capable of selecting standard switching for switching in the order of the ascending order and the descending order of the combustion amount, or special switching for switching in the predetermined order which shortens a switching time when switching the gas selector valve according to the target combustion amount. <P>COPYRIGHT: (C)2007,JPO&INPIT |
