Light emitting diode (LED) spot lamp

Abstract

The invention discloses a light emitting diode (LED) spot lamp which comprises a heat radiator, a lamp holder, a large power chip on board (COB) light source, a reflection bowl, a lens, a gland and a power supply, wherein the heat radiator comprises a heat radiating body and a heat conduction block; the heat radiating body comprises a shell and a heat radiating fin, the shell is provided with a cavity body, and the shell is provided with a heat radiating groove; the inner wall of the shell is provided with a clamping groove; the heat conduction block is made of red bronze, the heat conduction block is in interference fit with a clamping groove in a clamping way, and the upper surface of the heat conduction block is provided with an accommodating cavity; a substrate is in interference fit with the accommodating cavity in a pressing way, and a support is fixed on the heat conduction block through a lug on the support; and the reflection bowl is provided with a flange, the flange is arranged above a step, the lens is arranged on the reflection bowl, the gland is installed on the upper end of the heat radiator and contacted with the lens, and after the gland is installed, and the support squeezes the substrate so that the substrate and the heat conduction block are deformed. By adopting the structure, the heat radiation effect can be improved, and the fixation reliability of the LED light source can be improved.

Description

technical field [0001] The invention relates to LED spotlights. Background technique [0002] LED high-power COB spotlights are spotlights that use light-emitting diodes as light sources. Traditional spotlights mostly use halogen lamps, which have low luminous efficiency, relatively high power consumption, rising ambient temperature and short service life. LEDs are widely used because of their advantages such as long life, high luminous efficiency, low radiation and low power consumption. For LED lamps, if the heat dissipation effect is good, the service life of LED lamps can be improved, and the light efficiency can also be improved. Therefore, people have done a lot of research in this regard. For example, in the patent document with the application number 201120577155.3, the application date is 2011.12.24, and the authorized announcement date is 2012.11.14, a split-type LED spotlight radiator is disclosed. It is made of DH7 aluminum material, and the cooling feet are th...

AI Technical Summary

Problems solved by technology

Although the above-mentioned LED spotlight radiator has heat dissipation feet, which increases the heat dissipation area and improves the heat dissipation effect, the heat dissipation effect is still not good for high-power COB light sources with relatively concentrated heat.

In addition, the existing high-power COB light sources are all bonded by thermally conductive adhesives. Due to the low thermal conductivity of thermally conductive adhesives, even an extremely thin layer will increase thermal resistance for heat conduction. However, after a period of time, the thermally conductive adhesive will There will be aging and poor bonding performance. Therefore, on the one hand, it will affect the speed of heat conduction, on the other hand, it will make the high-power COB light source not firmly fixed, and finally affect the service life of LED spotlight

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