Patent ID: 8690393

Claim:
An LED lighting fixture, comprising: a heat sink, in which the heat sink provided with a center hole section and a plurality of radiating sections arranged around the center hole section; and a concave opening formed at the front end of the heat sink by the surrounding of the radiating sections; a reflection cup, in which the reflection cup arranged at the concave opening of the heat sink; and the outerwall of the reflection cup making contact with the radiating sections; an LED module, in which the LED module formed by a plurality of LEDs welded on a ceramic substrate and arranged at the bottom of the reflection cup; a supporting member, in which a hollow through hole formed in the middle of the supporting member and making contact with the circumference of the substrate of the LED module; at least one heat pipe, in which a sealed inner cavity formed inside the heat pipe and provided with a powder sintering section and a working solution subjected to vapor-liquid two-phase variation; and the heat pipe helically surrounding the outerwall of the reflection cup and having a tail end making contact with the supporting member, so that the heat produced when the LED module operates is rapidly conducted to the reflection cup and the radiating sections; and a vapor chamber, in which a sealed inner cavity formed inside the vapor chamber and provided with a powder sintering section and a working solution subjected to vapor-liquid two-phase variation; a smoothing section and two interposing sections formed outside the vapor chamber; the smoothing section used for receiving the LED module; and the two interposing sections symmetrically arranged at both ends of the smoothing section by press forming, perpendicular to the smoothing section and interposed and fixed into the center hole section, so that the heat produced when the LED module operates is rapidly conducted to the heat sink; wherein the total radiating power after the vapor chamber is combined with the heat pipe being more than or equal to the thermal power produced by the LED module; and the heat conduction path of the LED module being as follows: the heat directly conducted from the LEDs to the ceramic substrate first, then directly conducted to the heat pipe and the vapor chamber, finally conducted to the reflection cup and the heat sink, and dispersed by a fin device of the heat sink via cross-ventilation and radiation, in which both the substrate and the heat pipe are heat conduction media with low thermal resistance.