An LED lamp includes LED chips, an axle, and a lampshade. The LED chips are mounted on surface of the axle. The axle which is coupled to the lampshade includes heat pipes for transferring the heat generated by the LED chips to exterior of the lampshade and obtaining a better heat dissipation.
1. An LED lamp, comprising:
a lampshade having a concave surface, at least a hole and an opening said hole being formed on said lampshade;
an axle including a plurality of heat pipes, each one of said heat pipes having a heat receiving portion being coupled to said lampshade and a heat dissipating portion being disposed outside of said lampshade; and
a plurality of LED chips, mounted on surface of said heat receiving portion of said heat pipes;
wherein said plurality of LED chips and said heat pipes are arranged with respect to each other so that heat generated by said LED chips is transferred by said heat pipes from said heat receiving portion to said heat dissipating portion.
2. The LED lamp according to claim 1 , wherein surface of said LED chips are covered with a transparent material for preventing said LED chips from reaction with air.
3. The LED lamp according to claim 2 , wherein said transparent material is chosen from one of epoxy and silicone.
4. The LED lamp according to claim 1 , further comprising a transparent plate mounted on said opening of said lampshade for preventing foreign objects entering said lampshade.
5. The LED lamp according to claim 4 , wherein a space enclosed by said transparent plate and said lampshade is filled with a transparent material for preventing said LED chips from reaction with air.
6. The LED lamp according to claim 5 , wherein said transparent material is chosen from one of nitrogen and inert gas.
7. The LED lamp according to claim 5 , wherein said transparent material is chosen from one of epoxy and silicone.
8. The LED lamp according to claim 4 , wherein a space enclosed by said transparent plate and said lampshade is vacuumed for preventing said LED chips from reaction with air.
9. The LED lamp according to claim 1 , wherein an end of said axle is covered with an end plate for mounting LED chips.
10. The LED lamp according to claim 1 , wherein each heat pipe has a trapezoid section for forming said axle with a polygon section.
11. The LED lamp according to claim 1 , wherein each exterior surface of said heat pipe is covered by a printed circuit board.
12. The LED lamp according to claim 1 , further comprising an electrically insulation layer covering exterior surface of said heat pipes.
13. The LED lamp according to claim 1 , wherein said LED chips are bare chips.
14. The LED lamp according to claim 1 , wherein said LED chips emit light of different colors or the same color.
15. The LED lamp according to claim 1 , wherein said axle further comprises a rod for enhancing stiffness.
16. The LED lamp according to claim 1 , further comprising at least a radiation fin mounted on said heat dissipating portion of said axle.
17. The LED lamp according to claim 1 , wherein said heat pipes pass through said hole into said lampshade, extend across both sides of said lampshade and is defined with said heat receiving portion and said heat dissipating portion.
18. The LED lamp according to claim 1 , wherein said heat receiving portion is disposed inside of said lampshade.