| 摘要 |
An LED heat sink apparatus (20) comprising a housing (22) that defines a chamber (26). A downward platform (82) is connected with the housing (22) in the chamber (26) to define a bottom cavity (84) and a central cavity (88). LED's (94) are disposed in the bottom cavity (84) for emitting light through a lens (60). The downward platform (82) defines a plurality of holes (106, 108, 116, 118), and a solid ring (104) that has a substantially impervious surface to divide the holes (106, 108, 116, 118) into chimney holes (106, 116, 118) disposed radially inwardly from the solid ring (104) and the LED (94) for directing hot air heated by the LED (94) in the bottom cavity (84) of the chamber (26) into the central cavity (88), and return holes (108) disposed radially outwardly from the solid ring (104) and near the side wall (24) of said housing (22) for directing cool air in the central cavity (88) of the housing (22) that has been cooled by the side wall (24) of the housing (22) into the bottom cavity (84). |
| 主权项 |
1. An LED heat sink apparatus (20) comprising;
a housing (22) with a side wall (24) disposed about an axis (A) to define a chamber (26) and extending between a closed end (28) closing said chamber (26) and an open end (30) opening said chamber (26), a lens (60) coupled with said closed end (28) of said housing (22), a downward platform (82) connected with said side wall (24) of said housing (22) in said chamber (26) to define a bottom cavity (84) of said chamber (26) between said downward platform (82) and said lens (60) and a central cavity (88) of said chamber (26) between said downward platform (82) and said closed end (28) of said housing (22), at least one LED (94) coupled with said downward platform (82) in said bottom cavity (84) for emitting light through said lens (60), said downward platform (82) defining a plurality of holes (106, 108, 116, 118) for passing air between said bottom cavity (84) and said central cavity (88), a seal assembly (62) sealing said lens (60) to said open end (30) of said housing (22) to seal said chamber (26), and characterized by, said downward platform (82) further defining a solid ring (104) having a substantially impervious surface disposed radially outwardly from and about said LED to divide said holes (106, 108, 116, 118) into at least one chimney hole (106, 116, 118) disposed radially inwardly from said solid ring (104) and said LED (94) for directing hot air heated by said LED and concentrated near said chimney hole (106, 116, 118) in said bottom cavity (84) of said chamber (26) into said central cavity (88) and at least one return hole (108) disposed radially outwardly from said solid ring (104) and near said side wall (24) of said housing (22) for directing cool air in said central cavity (88) of said housing (22) that has been cooled by said side wall (24) of said housing (22) through said return hole (108) and into said bottom cavity (84).
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