| 摘要 |
PROBLEM TO BE SOLVED: To obtain a vacuum solar heat collecting system with a snow melting function of effectively utilizing collected high temperature heat adapted to a snowfall cold district. SOLUTION: The vacuum solar heat collecting system with a snow melting function comprises a suction and exhaust tube 11 connected to a vacuum exhaust source and a suction valve for a vacuum solar heat collector adapted to a snowfall cold district and attached to a glass cylinder 12, to provide a function of melting the snow on a surface of the cylinder internally installed in the collector by a convection heat release by increasing or decreasing an atmospheric pressure in the cylinder. A low temperature difference Stirling engine is cooperated to effectively use the high temperature heat excessively collected as a disadvantage in summer from merits of the heat collector, and electrically generates by the heat in summer. In winter, the engine is reversely operated, used as a low temperature difference Stirling heat pump to melt the snow of the collector by the heat obtained from the atmospheric heat. Further, the vacuum solar heat collecting system with the snow melting function having an exhausting function of the cylinder is operated by the vacuum pump contained in the low temperature difference Stirling engine.
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