| 摘要 |
<p>An electrical thermal glass ampoule for fire fighting sprinkler is disclosed. The ampoule (200) according to the present invention comprises a closed hollow cylindrical glass casing (100), an electrically heating coil (120) installed inside of said glass casing, a negative electrode (140) provided on outer surface at bottom end of said casing and electrically connected with one end of said coil, a positive electrode (142) provided on outer surface at side wall of said casing and electrically connected with the other end of said coil, and heat expansive gas (G) entrapped inside the casing. The glass ampoule (200) can be precisely manufactured as a single body integrated with a thermal coil (120) inside of the casing, have good install handiness due to no necessity of coil being wound around the ampoule and has long term duration because the coil (120) is installed inside the glass casing (100) and, thus can be prevented from corrosion. Further, the glass ampoule (200) according to the present invention has another advantage of much faster actuating response because the coil (120) is heated inside the glass casing and, thus, can give heat directly to the gas (G).</p> |
