LED street lamp heat radiation method and LED street lamp

Abstract

The invention discloses a heat dissipation method for LED street lamps and an LED street lamp. The method comprises the steps as follows: a. the external surface of a PCB board is coated by a layer of radiation heat-dissipation temperature-reduction coating; b. an LED is arranged on one surface of the PCB board and the heat-dissipation metal part of the LED base is closely clung to the PCB board; c. the other surface of the PCB board is closely clung to the internal surface of the lamp shell, thus being assembled to form the LED street lamp. The LED street lamp comprises a lamp shell with a thermal slug; the lamp shell is internally provided with the PCB board; the external surface of the PCB board is provided with the radiation heat-dissipation temperature-reduction coating layer; one surface of the PCB board is clung to the internal surface of the lamp shell and the other surface thereof is provided with a plurality of LEDs. The heat dissipation method comprises the following heat dissipation paths sequentially: LED, PCB board, radiation heat-dissipation temperature-reduction coating layer, lamp shell and outside of the lamp body; the directional heat dissipation processing technology leads the heat generated when the LED runs to be conducted quickly from the substrate to the lamp shell 1, thus leading the inside and outside of the lamp body to be arranged in a heat balance quickly, and not only prolonging the service life of the lamp, but also reducing the cost of the lamp, lightens the weight of the lamp, and also reducing the cost simultaneously.

Description

technical field [0001] The invention belongs to the technical field of lighting fixtures, and in particular relates to an LED street lamp using a light emitting diode as a light source and a heat dissipation method thereof. Background technique [0002] Like traditional light sources, semiconductor light-emitting diodes (LEDs) also generate heat during operation, the amount of which depends on the overall luminous efficiency. Under the action of external electric energy, the radiative recombination of electrons and holes produces electroluminescence, and the light radiated near the P-N junction needs to pass through the semiconductor medium and packaging medium of the chip (chip) itself to reach the outside world (air). Considering the current injection efficiency, radiative luminescence quantum efficiency, and chip external light extraction efficiency, a considerable part of the energy is mainly converted into heat energy in the form of lattice vibrations that occur through...

AI Technical Summary

Problems solved by technology

Increase the heat dissipation area, which greatly increases the weight of the lamp. The weight of the popular LED street lamps on the market is two to three times that of the existing street lamps. Some street lamps weigh more than 20kg, which is extremely unfavorable to the safety performance of the street lamps. Lamp cost; at the same time, this traditional heat dissipation method is also a three-dimensional heat dissipation method, that is, the heat generated by the lamp is dissipated to the surroundings, which will cause the temperature in the lamp body to be greater than the temperature of the outer shell, and it is easy to damage the normal working environment of the LED.

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