Patent ID: 8506088

Claim:
An airflow-guiding device, applied to a projector with a light source having a reflector and a lampwick at least partly disposed in the reflector, comprising: a cap, having an airflow inlet, a through opening, and an airflow outlet and comprising: a foundation, suitable for being connected to the reflector, wherein the through opening is located at the foundation and suitable for corresponding to a light outlet of the reflector; an annular side wall, disposed on the foundation, wherein the airflow inlet is located at the annular side wall; and a cover, disposed on the annular side wall and opposite to the foundation, wherein the airflow outlet is located at the cover; and a guiding element, having a guiding opening and comprising: an annular body, rotatably disposed in the cap, wherein the guiding opening is located at the annular body, the annular body surrounds at least a portion of the through opening, and the annular body and the annular side wall together form a guiding tunnel in the cap, and an additional weight structure disposed on the annular body such that the guiding opening is located at a position opposite to the direction of the gravity, wherein the guiding opening and the additional weight structure are disposed at opposite sides of the lampwick in the direction of gravity such that an airflow directly passes through a to surface of the lampwick.