| 摘要 |
The present application relates to a reliable and inexpensive method for manufacturing a vacuum-tight envelope for a vacuum solar thermal panel, said vacuum-tight envelope being defined by a glass front plate (1) transparent to solar radiation, a metal bottom plate (2), a peripheral frame (3) joined to the metal bottom plate (2), and a peripheral belt (4) connecting said peripheral frame (3) to the glass front plate (1); said method comprising the following steps:
- joining edge to edge a first metal strip to a second metal strip in order to form a bi-metal strip, and then joining together the opposite ends of said bi-metal strip in order to form a closed loop;
- after said joining step, forming said first metal strip into the peripheral frame (3) and said second metal strip into the peripheral belt (3);
- after said joining and forming steps, sealing the free edge of the peripheral belt (4) to the glass front plate (1);
- after said joining and forming steps, joining the metal bottom plate (2) to the peripheral frame (3). |
