| 摘要 |
A pressing device has pressing elements which are hollow and closed, each having first and second heat transmission walls with a heat transporting medium present in the cavity within each element. The medium absorbs thermal energy from the first heat transmission wall while changing from the liquid phase into the vapor phase and delivers thermal energy to the second heat transmission wall, while changing from the vapor phase into the liquid phase, and absorbs thermal energy from the second heat transmission wall while changing from the liquid phase into the vapor phase and delivers thermal energy to the first heat transmission wall while changing from the vapor phase into the liquid phase. In each cavity a porous mass is present connecting the heat transmission walls in such manner that all the heat transporting medium condensed on the second or first heat transmission wall can flow respectively through the said mass by capillary action.
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