| 摘要 |
The invention discloses a projector including an optical system, a guiding passage, and two fans. The optical system includes three panels. The guiding passage has three outlets and two inlets. Each outlet of the guiding passage is located opposite to each panel. Each inlet of the guiding passage is located opposite to each fan. Each of the fans directs an air flow into the guiding passage. Thereby, the air flow effectively cools each panel of the optical system.
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