Low-pressure mercury-vapor discharge lamp having electrode shield carrying direct electric current
    3.
    发明授权
    Low-pressure mercury-vapor discharge lamp having electrode shield carrying direct electric current 失效
    低压汞蒸气放电灯,具有承载直流电的电极屏蔽

    公开(公告)号:US06630787B2

    公开(公告)日:2003-10-07

    申请号:US09801632

    申请日:2001-03-08

    IPC分类号: H01J1720

    摘要: A low-pressure mercury-vapor discharge lamp is provided with a discharge vessel and a first and a second end portion (12a). The discharge vessel encloses a discharge space provided with a filling of mercury and an inert gas in a gastight manner. Each end portion (12a) supports an electrode (20a) arranged in the discharge space. An electrode shield (22a) encompasses the electrodes (20a) and, according to the invention, carries an electric current during operation, and is at a temperature ≧250° C., preferably ≧450° C., during nominal operation of the discharge lamp. Preferably, a first current supply conductor (30a) electrically contacts a first current divider (23a), which is electrically connected to a second current divider (23a′) via a shell-shaped body (24a). Said second current divider (23a′) electrically contacts the electrode (20a), which is connected to the second current supply conductor (30a′), the electrode shield (22a) is made from stainless steel, in particular a chromium nickel steel. Preferably, the heat dissipation of the electrode shield (22a) during nominal operation ranges between 0.1 and 10 Watts. Preferably, the electrode shield (22a) is made from a ceramic material or carbon. The discharge lamp exhibits a comparatively low mercury consumption.

    摘要翻译: 低压水银蒸汽放电灯具有放电容器和第一和第二端部(12a)。 放电容器以气密的方式包围设置有汞和惰性气体填充物的放电空间。 每个端部(12a)支撑布置在放电空间中的电极(20a)。 电极屏蔽(22a)包围电极(20a),并且根据本发明,在操作期间承载电流,并且在标称操作期间在> = 250℃,优选> = 450℃的温度下 放电灯。 优选地,第一电流供应导体(30a)电接触经由壳体(24a)电连接到第二分流器(23a')的第一分流器(23a)。 所述第二分流器(23a')电连接到连接到第二电流供应导体(30a')的电极(20a),电极屏蔽(22a)由不锈钢,特别是铬镍钢制成。 优选地,在标称操作期间电极屏蔽件(22a)的散热范围在0.1-10瓦特之间。 优选地,电极屏蔽(22a)由陶瓷材料或碳制成。 放电灯表现出较低的汞消耗。