| 摘要 |
1. Absorbing element (1) for selectively absorbing solar energy and adapted to be inserted between two envelopes (2, 3) comprising an outer envelope (2) and an inner envelope (3) which delimit between them a vacuum space (4), wherein the inner envelope constitutes the wall of a housing adapted to contain a heat exchanger, characterized in that said element comprises two sheets (6, 7) made of a heat-conducting material, each one of said sheets being folded under an angle alpha, in such a manner that after assembly of said two sheets said element has a rhombus-shaped section and surrounds the inner envelope while engaging the same tightly and permanently in four zones of contact. |
