| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hot water generator, having a high ability to prevent the hot water temperature from rising to a preset temperature or higher when withdraw of hot water is stopped, and withdrawing hot water having a comparatively low temperature with priority when withdrawal of hot water is restarted. Ž<P>SOLUTION: A hot water withdrawal pipe 5 of a heat exchanger 1 and a cold water intake pipe 4 thereof are connected through a circulating pipe 40 having a circulating pump 39. A cold water reservoir 42 is provided in the heat exchanger 1 on its cold water intake pipe 4 side. When withdrawal of hot water is stopped, the circulating pump 39 forces hot water in the heat exchanger 1 to circulate through the cold water reservoir 42, cold water intake pipe 4, circulating pipe 40 and hot water withdrawal pipe 5 back to the heat exchanger 1. The temperature of circulating hot water is lowered by the cold water reservoir 42 so that the ability to prevent the hot water temperature from rising to a preset temperature or higher is enhanced. When withdrawal of hot water is restarted, hot water having a comparatively low temperature circulated from the circulating pipe 40 toward the hot water withdrawal pipe 5 can be withdrawn with priority. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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