The heat dissipation of led street lights is one of the key problems that need to be solved

The heat dissipation of led street lights is one of the key problems that need to be solved. It is not only directly related to the luminous efficiency of the LED when it is actually working, but also because of the high brightness requirements and high heat generation of LED street lights, and the outdoor use environment is more demanding, if the heat dissipation is not good It will directly lead to rapid aging of leds and lower stability. Because road lamps used outdoors should have a certain level of dust and water resistance (ip), good ip protection often hinders the heat dissipation of the LED. Solving these two contradictory but both problems is an important aspect that should be paid attention to when designing road lamps. The unqualified and unreasonable situations in current use basically include:

(1) A radiator is used for the LED, but the design of the terminal and the radiator of the LED connection cannot reach ip45 and above, and cannot meet the requirements of the gb7000.5/iec6598-2-3 standard.

(2) Adopt the ordinary road lamp housing, and use the matrix LED in the light emitting surface of the lamp. Although this design can meet the ip test, the temperature of the inner cavity of the lamp will increase due to the lack of ventilation in the lamp. At 50℃~80℃, under such high working conditions, the luminous efficiency of LED is impossible to be high, and the service life of LED will be greatly reduced. In fact, there are obvious unreasonable conditions.

(3) The instrument fan is used in the lamp to dissipate the LED and the radiator. The air inlet is designed under the lamp to avoid rainwater, and the air outlet is designed around the downward LED light source. This can also effectively avoid the entry of rainwater. In addition, the heat dissipation of LED street lights is one of the key problems that need to be solved. It is not only directly related to the luminous efficiency of the LED in actual work, but also because of the high brightness and heat generation of LED street lights, and outdoor problems This kind of use environment is more demanding, if the heat dissipation is not good, it will directly lead to the rapid aging of the led and reduce the stability. Because road lamps used outdoors should have a certain level of dust and water resistance (ip), good ip protection often hinders the heat dissipation of the LED. Solving these two contradictory but both problems is an important aspect that should be paid attention to when designing road lamps.

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