| 摘要 |
The invention relates to a fluorescent lamp ( 1 ) adapted for cold environments, which comprises an elongated main tube ( 11 ), fixing devices ( 12 ) at each end of the fluorescent lamp ( 1 ) for fixing the fluorescent lamp ( 1 ) in a light fitting ( 27 ), two electrodes ( 15 ) placed inside the main tube ( 11 ), a heat-insulating outer tube ( 20 ) that surrounds the main tube ( 11 ) and creates an airspace ( 22 ) between the main tube ( 11 ) and the outer tube ( 20 ). Each fixing device ( 12 ) comprises an end cap ( 41 ) with a radial part ( 41 b), that delimits an outer end plane of the fluorescent lamp ( 1 ), and with an axial peripheral part ( 41 a), that is connected to an end of the outer tube ( 20 ). An axial spacer ( 29, 31 ) with low heat conductivity has a first end part ( 33 ) that is connected to an end ( 34 ) of the main tube ( 11 ) and a second end part ( 38 ) that adjoins the outer end plane and keeps the main tube ( 11 ) separate from the end cap ( 41 ) in order to reduce the transmission of heat from the main tube ( 11 ) to the end cap ( 41 ) and the outer tube ( 20 ). |
