| 摘要 |
<p>A process for the manufacture of a thermal solar collector of the type comprising a heat pipe (5) partially enclosed within a glass vacuum jacket from an open tube, one end of which is sealed into the neck (6) of a glass envelope (7), comprises the steps of providing a region of reduced bore (10) at the enveloped end of the tube, locating fusible sealing means in the tube adjacent the region of reduced bore, evacuating the envelope via the tube, and melting the fusible means so that it seals the tube on solidifying. The fusible means may be a metal ball (9) coated with silver solder. The process avoids the creation of a seal in the glass envelope. <IMAGE></p> |
