| 摘要 |
A solar collector of the direct flow type comprises a solar absorbing tube 3 containing elongate tube 11, and a working fluid. The elongate tube 11 contains a concentrically positioned inner pipe 12 thereby forming two concentric internal flow passage ways 13, 14 for the flow of a fluid to be heated. The elongate tube 11 extends out of one end of the solar absorbing tube 3 and into an end fitting 15 wherein an annular outer passageway 13 of the elongate tube11 communicated with a cold fluid inlet conduit 16 within the end fitting 15 and the inner passageway 14 of the elongate tube 11 communicates with a hot water outlet conduit 17 within the end fitting 15. A central dividing wall 19 divides the fitting 18 into the cold fluid inlet conduit 16 and the hot fluid outlet conduit 17. Fluid can flow between the tubular passages 18 of adjacent solar tubes 3. The open ends of the passages 18 comprise recesses to provide a circumferential seat 20 for an O-ring 21 or similar sealing means to provide a fluid-tight seal when adjacent end fittings 15 are mounted together. Each tubular passage 18 is provided with a receiving portion 22 extending orthogonally to the tubular passage 18 for receiving an end of the concentric elongated tube 11. One or more O-ring seals 23 are located within annular seats around the periphery of the pipe for providing a seal between the end of the pipe 11 and the pipe receiving portion 22. The end fittings 15 are interconnected to provide fluid flow paths without the need for a manifold. Any number of solar collector tubes can be interconnected in this way. The invention also applies solar collectors of the heat pipe type. <Figure 8> |
