| 摘要 |
PROBLEM TO BE SOLVED: To provide an LED lighting fixture capable of generating airstream with substantial heat radiation effects.SOLUTION: A ventilating part 25 is provided between a lower outer cylinder 20 and an LED light source 44, and an outflow channel 27 is provided between the lower outer cylinder 20 and an upper outer cylinder 30 for air to flow outside from the lower outer cylinder 20. Then, inflow channels 323, 324 flowing in from the lower outer cylinder 20 to an upper outer cylinder 30 are provided, as well as an outflow port 37 at an upper end of the upper outer cylinder 30. With this, rising airstream generated by heat released from the LED light source 44 flows outside from the outflow channel 27 fitted between the lower outer cylinder 20 and the upper outer cylinder 30, through the ventilating part fitted between the lower outer cylinder 20 and the LED light source 44. Further, air flows in from the lower outer cylinder 20 to the upper outer cylinder 30 through the inflow channels 323, 324, and flows outside from the outflow port 37 provided at an upper end of the upper outer cylinder 30. For this, flow of air for cooling the LED light source 44 housed in the lower outer cylinder 20 and a power source device 33 housed in the upper outer cylinder 30 is easily generated to exhibit substantial heat radiation effects. |
