Light-emitting diode (LED) lamp unit with high heat-radiating performance and modular high-power LED lamp thereof

Abstract

The invention discloses a light-emitting diode (LED) lamp unit with a high heat-radiating performance. The LED lamp unit with the high heat-radiating performance comprises a lens, a chip, an electrode, gold wires and a heat sink. The heat sink comprises an insulation base plate in a circular truncated cone shape, and a cylindrical heat conducting bar. The insulation base plate is welded at the top end of the heat conducting bar. The lens, the chip, the electrode and the gold wires are welded on the insulation base plate. Therefore, heat generated by the chip is conducted to the heat conducting bar below the insulation base plate through the insulation base plate and is radiated. The invention further discloses a modular high-power LED lamp formed by LED lamp units. The LED lamp unit directly conducts the heat generated by the chip to a heat radiating unit through the heat sink to radiate, the number of heat resistance layers is reduced, and therefore heat radiating efficiency is improved so as to improve the reliability of the LED lamp and prolong the service life of the LED lamp.

Description

technical field [0001] The utility invention relates to an LED lamp and a lamp thereof, in particular to a high-power LED lamp unit module with high heat dissipation performance and a modularized high-power LED lamp composed of the same. Background technique [0002] LED (Light Emitting Diode) is a kind of light-emitting diode that uses current to flow forward to the p-n junction coupling of light-emitting semiconductors, prompting electrons to recombine with holes in the P region, and releasing excess energy in the form of light and heat, thereby converting electrical energy A source of light and heat. It has many advantages such as low-voltage power supply, low energy consumption, strong applicability, high stability, short response time, no pollution to the environment, multi-color light, long service life and durability, etc. It can be used continuously for 100,000 hours, and its life It is 100 times longer than ordinary incandescent bulbs. Therefore, it has become the ...

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Problems solved by technology

Although such a heat dissipation structure of LED lights is stable and reliable in electricity transmission, there are deficiencies in the heat dissipation structure: (1) The heat dissipation direction is single, and the efficiency of heat conduction is low

Because most of the heat of the LED lamp chip 2 is conducted to the heat dissipation unit through the heat sink 3, and then to the atmosphere through the heat dissipation unit, and the heat dissipation fins 5 used in the existing heat dissipation unit are generally bonded by the heat dissipation substrate 51 and the heat dissipation surface of the LED. , the heat dissipation fins 52 are arranged at intervals perpendicular to the heat dissipation substrate 51, such as figure 1 As shown, that is, only heat dissipation ribs 52 are provided in the heat conduction direction of the LED lamp, and the heat dissipation surface is limited; (2) The number of thermal resistance layers is large, that is, most of the heat emitted by the LED lamp chip 2 passes through the solder h, the heat sink 3, and the circuit Plate 4, heat sink 5 of thermal conductive glue and other multiple media can be conducted to the heat dissipation unit, which weakens the heat conduction efficiency; (3) In the case of no forced air flow, the heat dissipation efficiency is not high, especially when it is assembled into a high-power LED lamp Cooling efficiency is very uneven

Because the heat dissipation fins 52 are arranged along the direction of heat conduction, in the absence of forced air flow, the area close to the heat dissipation substrate 51 is often a dead angle of air flow, and it is difficult for cold air to replenish this area, thereby affecting the heat dissipation fins 5. cooling efficiency

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