Patent ID: 8247956

Claim:
An LED illuminating device, comprising: a boiling room defined among an outer tube, an inner tube coaxially received in the outer tube with a bottom end thereof higher than a bottom end of the outer tube, an absorption member coupling to and sealing the bottom end of the outer tube, a dissipation member coupling to and sealing the bottom end of the inner tube, and a sealing plate arranged between top ends of the outer tube and the inner tube, the boiling room comprising a lower room being defined between the dissipation member and the absorption member, and an annular room being defined between the inner tube and the outer tube, a lower portion of the annular room surrounding the lower room; working fluid filled in the lower room of the boiling room; an optical module being provided with a plurality of LEDs attached to the absorption member; an electrical module being electrically connected with the LEDs; and an adiabatic member being received in the lower room of the boiling room and attached to the dissipation member to thermally insulate the dissipation member from vaporized working fluid in the lower room of the boiling room.