LED (Light Emitting Diode) spotlight for heat loss through convection by air

Abstract

The invention relates to an LED (Light Emitting Diode) spotlight for heat loss through convection by air, which comprises a radiator and an optical engine. The radiator comprises a cylindrical shell opened at both ends and connected as a cavity and a radiating piece in the cavity of the cylindrical shell. The optical engine comprises a front cover, an aluminum base plate, a plurality of lenses arranged between the front cover and the aluminum base plate, and a plurality of LEDs. After assembly, external air is communicated with the cavity in the front cover through a ventilating through groove. The aluminum base plate is fixedly connected at the central position of a heat conductive connecting part on the radiator through a bolt. The section of the aluminum base plate is smaller than that of the cavity of the radiator so that the cavity in the front cover is communicated with lower openings of vertical convection cavities independently arranged through gaps in the periphery of the aluminum base plate, and the upper openings of the vertical convection cavities independently arranged are communicated with external air. With the adoption of the structure, the LED spotlight radiates in vertical convection by air, is fewer in structural components, easy to assemble and convenient to extend and expand products, and low in cost.

Description

technical field [0001] The invention relates to the technical field of LED spotlights, in particular to an LED spotlight with air convection heat dissipation. Background technique [0002] With the continuous development of lighting technology, various lamps are constantly being introduced. LED lighting fixtures have been widely used in many occasions due to their advantages of energy saving and environmental protection. However, how to better dissipate heat from LEDs has become a difficult point in LED lighting technology. [0003] Especially for the structure of LED spotlights, the existing optical engine, heat sink and assembly structure cannot achieve air convection heat dissipation, and can only dissipate heat through traditional conduction, which has low heat dissipation efficiency: [0004] The heat dissipation structure of existing spotlights usually uses a single radiator or a radiator plus a fan. The radiator plus a fan will increase the cost and require additiona...

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Problems solved by technology

[0003] Especially for the structure of LED spotlights, the existing optical engine, heat sink and assembly structure cannot achieve air convection heat dissipation, and can only dissipate heat through traditional conduction, which has low heat dissipation efficiency:

[0004] The heat dissipation structure of existing spotlights usually uses a single radiator or a radiator plus a fan. The radiator plus a fan will increase the cost and require additional power supply; while the existing single radiator usually uses heat conduction and heat dissipation. Heat dissipation is carried out by increasing the contact area between the heat sink and the external air. However, this heat dissipation effect cannot solve the heat island effect of local heat dissipation and high temperature in contact with the heat source, and it is easy to cause poor heat dissipation. For the cylindrical closed type used in spotlights For the radiator of the shell, it only relies on conduction and heat sink to dissipate heat, and its heat dissipation effect is relatively poor, which is not conducive to the heat dissipation needs of high-power LED lights that work for a long time

[0005] The optical engines of existing spotlights are all composed of LEDs, lenses, and front covers mounted on aluminum substrates. The lens holes on the front cover are equipped with lenses and LEDs. This assembly is sealed. Therefore, when dissipating heat, The heat sink assembled on the optical engine cannot realize the function of air convection heat dissipation, which greatly weakens the heat dissipation effect of the LED lamps

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