LED streetlamp capable of improving heat dissipation of driving power source

Abstract

The invention provides an LED streetlamp capable of improving the heat dissipation potential of a driving power source. The LED streetlamp comprises an aluminum extrusion lamp housing integrated radiator, a driving power source radiator of a cover overturning structure, a waterproof power source radiator front cover, an LED driving power source, a light source module and the like. The LED driving power source is provided with a power source radiator with radiating fins in a close contact mode, the heat dissipation of the power source in the working process is improved depending on the expanded area of the radiator, and the service life of the streetlamp is prolonged. The power source radiator is of an inverted-U-shaped structure and is embedded into fins of the lamp housing integrated radiator; combining with the power source radiator front cover, exposed electrical parts of the LED streetlamp are covered from the top, the electrical parts of the LED streetlamp are prevented from rainwater pouring and sunshine radiation, and the risk of ageing and flooding water of parts of the electrical parts is lowered. Meanwhile, the power source radiator is of the cover overturning structure, can be overturned backwards by more than 90 degrees and can be supported by a lamp pole, so that installation construction and post-maintenance of the LED streetlamp are facilitated.

Description

technical field [0001] The invention relates to the field of LED street lamps, in particular to an LED street lamp using an aluminum extruded lamp housing integrated radiator. Background technique [0002] The use of LED street lamps has now become the main technical means for governments at all levels to vigorously promote green lighting and achieve energy saving and emission reduction. The operating life of LED street lights is limited by the light decay of the light source and the service life of the switching power supply that drives the LED to work. The greatest impact on the life of switching power supplies is the degradation of the characteristics of aluminum electrolytic capacitors. The reason is that the electrolyte in the electrolytic capacitors gradually evaporates, and the self-heating of the capacitors and the surrounding heat (close to the heating components) will accelerate the process. According to the empirical method of life doubling, the life of capacitor...

AI Technical Summary

Problems solved by technology

Moreover, the contact area between the drive power supply and the cast aluminum shell is poor in contact performance due to the roughness of the cast aluminum surface, which further reduces the heat dissipation performance

Therefore, such layout design of lamp driving power supply has the problem of low heat dissipation efficiency of the power supply.

[0009] The problem with the design method that the driving power supply is installed inside the non-waterproof lamp housing is that the requirements for protection are very high, including the power supply itself must be IP67, and the waterproof connector and waterproof connector must meet the protection standards of IP67 or even IP68. Raise the cost of lighting products

The exposure of electrical equipment will also cause the cable insulation rubber and silicone waterproof ring to corrode, age, and reduce the insulation and waterproof capabilities of the cable under long-term ultraviolet radiation, acid rain, etc., which will increase the risk of failure of the lamps.

[0010] In addition, since the cooling fins of LED street lamps must be designed to open upwards to facilitate air convection, there is no waterproof protection. The light source power supply cable drawn from the upper surface of the radiator is connected to the radiator through a waterproof connector with a protection level of IP67

However, after a long period of on-site operation, the plastic parts in the waterproof joint and the insulating rubber of the cable appear to be aging and brittle, which will easily cause the light source to absorb water vapor and cause short-circuit failure.

Moreover, if there is no waterproof cover for the light pole opening, rainwater will flow into the light pole along the cables and the inner wall of the light pole, which may cause electrical failure

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