| 摘要 |
PROBLEM TO BE SOLVED: To provide a closed loop type natural heat heat exchange device which is installed at low costs in an easier manner.SOLUTION: A natural heat heat exchange device includes a heat exchange unit 3 buried in the ground or water. The heat exchange unit 3 includes a flexible container bag 31 having water permeability. A filler 33 fills the flexible container bag 31 with first and second heat exchange sheets 32a, 32b, in which a heat medium is circulated, stored in a spiral shape in the flexible container bag 31. |
