| 摘要 |
The present invention includes an airtight precursor which is formed in an airtightly closed space to block internal air from external air and has an outer surface touching the extern air; an LED module which includes a metal PCB and an LED light emitting device and is located in the closed space of the airtight precursor; a circulation fan which is located in the closed space of the airtight precursor and diffuses the heat generated in the LED module into the closed space by repeatedly circulating the internal air in the closed space; and an electric supply part which is connected to external electricity and supplies electricity to the air circulation fan and the LED module. |
