| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a vacuum solar collector in which vacuum glass tubes can be replaced easily one by one. SOLUTION: A heat collector extending through a glass sealed metal to the out side of a vacuum glass tube is partially tubular and provided with a recess projecting to the outer circumference. An O-ring is fitted in the recess and a flange is provided on the end face of the branch pipe of a header pipe and a springy stripe metal ring having a cut, at a part thereof, is wound around the outside of a stopper ring and the flange, such that the stopper ring and the flange are fitted in the cut of the springy stripe metal ring.</p> |
