Patent ID: 7922365

Claim:
An LED illuminating device, comprising: an optical section being provided with a light source therein; an electrical section being electrically connected with the light source; and a heat dissipation section located between the optical section and the electrical section, the heat dissipation section being provided with a heat dissipation device, the heat dissipation device comprising a hollow metal tube, a bottom cover plate hermetically sealing a bottom of the metal tube, a top cover plate hermetically sealing a top of the metal tube, and a tubular member received in the metal tube, a plurality of metal fins extending upwardly from the top cover plate, the tubular member having a diameter smaller than the metal tube with a condensate passage channel defined between the metal tube and the tubular member, a bottom of the tubular member being spaced from the bottom cover plate with an evaporating chamber defined between the bottom of the tubular member and the bottom cover plate, a vapor passage channel being axially defined through a central portion of the tubular member, a top of the tubular member being spaced from the top cover plate with a condensing chamber defined between the top of the tubular member and the top cover plate, the vapor passage channel connecting the evaporating chamber with the condensing chamber, the condensate passage channel connecting the condensing chamber with the evaporating chamber, a working fluid being filled in the evaporating chamber, the light source being thermally attached to an outer surface of the bottom cover plate; wherein a first porous wick is received in the evaporating chamber and attached to the bottom cover plate, a second porous wick is filled in the condensate passage channel and connected with the first porous wick, and the working fluid is saturated in the first porous wick.