Convection cooling type LED illumination device

Abstract

The invention provides a convection heat dissipation type LED head lamp, comprising a plurality of LED lightening and heat dissipating units, a substrate at which the lightening and heat dissipating units are arranged and a framework; the substrate is fixedly connected with the framework; wherein, the substrate comprises a plurality of strip bodies which are arranged with a certain space length or take a gridding shape to form a hollowed-out structure, so that a plurality of channels which are capable of direct convection with the outside air are formed on the substrate; the strip bodies or the gridding structure is provided with the LED lightening and heat dissipating units at intervals; the LED lightening and heat dissipating units comprise LED chips, circuit boards, circuit accessing pieces and corresponding radiators and the LED lightening and heat dissipating units constitute an independent water-poof sealing member. The head lamp has excellent moisture-proof, water-proof and heat dispersion performance, modular structure and easy assembling, production and on-site maintenance.

Description

technical field [0001] The invention relates to an LED lighting lamp, in particular to an LED lighting lamp which dissipates heat through convection. Background technique [0002] The current LED lighting lamps usually adopt the technology of overall sealing and overall heat dissipation, that is, multiple low-power LEDs are directly welded and fixed on a circuit board at a certain interval, and then fixed on a heat dissipation plate or the overall heat dissipation shell of the lamp, so as to realize LED heat dissipation; in order to prevent moisture and water, a glass (or other transparent material) mask is added to the front of the lamp. For example, "an LED lighting lamp" disclosed in Chinese Invention Patent No. 200720050776.X includes a protective cover and an aluminum substrate on which LED chips are preset. [0003] The LED lighting lamp with the above structure has the following defects: [0004] A plurality of low-power LEDs share a heat sink so that the heat is to...

AI Technical Summary

Problems solved by technology

[0004] Multiple low-power LEDs share a heat sink, which makes the heat too concentrated, and a large amount of heat is sealed in the glass (or other transparent material) mask, which makes the heat dissipation effect poor, which will inevitably affect the luminous efficiency and service life of the LED.

Or by further enlarging the heat sink to improve the heat dissipation effect, so that the weight of the lamp is too large and the cost increases

At the same time, this overall structure is not easy to replace LED devices or components, which increases the complexity of the production and maintenance of the light source part of the lamp, resulting in low efficiency and high cost.

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