| 摘要 |
PROBLEM TO BE SOLVED: To prevent generation of an energy loss by mixing a heat medium when a stroke is switched, in a device alternately performing gas suction/release for heat exchange of the heat in accompany with the suction/release by the heat medium. SOLUTION: A heat medium removing gas supplier 10 feeding heat medium exclusion gas to inside a heat medium pipe line is connected to the heat medium pipe line 9b in a gas suction/release device, heat medium exclusion gas is forcedly introduced into the heat medium pipe line when a stroke is switched, and a heat medium is excluded from principal heat medium pipe lines 5a, 5b, 6a, 6b, 36, 37, 39, 40 and a heat medium flow path in material vessels 1, 2. In this way, by excluding the heat medium from the principal heat medium pipe line when the stroke is switched, mixing of the fellow different heat medium is avoided, and an energy loss can be decreased as small as possible.
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