| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a hot water supply temperature control device capable of preventing the sudden change in hot water temperature in significantly changing a set temperature and to improve the safety and amenity in a water heater comprising a hot water-cold water mixing function. <P>SOLUTION: A heat exchanger 4 is mounted in a state of applying a wall of a combustion chamber 2 in which a burnt gas generated in a burner 1 is sent and a wall of a burnt gas flow channel 3 are applied as a heat exchanging part, and a water supply pipe 5 and a tapping pipe 6 are mounted on the heat exchanger 4. A bypass passage 7 branched from the water supply pipe 5 is connected to the tapping pipe 6, a tapping temperature sensor 8 and a water connection valve 9 are mounted on the tapping pipe 6, a tapping temperature control means 12 for changing openings of the water connection valve 9 and the bypass valve is operated in two modes of a normal mode and a caution mode in changing the set temperature, and a variable speed of the water connection valve 9 and the bypass valve 10 is lowered under the operation in the caution mode. The tapping temperature control means 12 is operated in the caution mode when the set temperature data is over a reference value in changing the set temperature, and the temperature difference in changing is outside of a specific range. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
