| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat accumulation tank capable of further improving heat reserving performance. Ž<P>SOLUTION: This heat accumulation tank 1 has a double structure tank 10 put in a vacuum state in a space between an inner tank 11 and an outer tank 12. Both an introducing pipe 20 for introducing cooling water inside the inner tank 11 from the outside of the outer tank 12 and a deriving pipe 30 for deriving the cooling water to the outside of the outer tank 12 from the inside of the inner tank 11, are wound in a vacuum space 14 between the inner tank 11 and the outer tank 12. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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