| 摘要 |
Device for automatic draft control of a furnace having an oil burner, a smoke flue, and an exhaust valve located in the smoke flue, part of said smoke flue comprising a metal tube which is connected with the wall of a chimney, said device comprising a first sensoring device provided on said metal tube and subjected to the influence of the temperature prevailing in said tube, and a second sensoring device provided in said chimney wall, said first and second sensoring devices being connected with the exhaust valve in such a manner that their combined registration is transmitted to the exhaust valve. |
