Patent ID: 7607782

Claim:
A cooling system for cooling a lamp module within a projection apparatus, the cooling system comprising: an axial fan unit for mounting within the projection apparatus, defining an axial direction and having an air discharging side to permit an airflow flow therethrough upon actuation of said axial fan unit, said airflow defining a flow direction that cooperates with said axial direction to define an angle therebetween; and a flow-guiding duct having an air inlet located adjacent to said air discharging side of said axial fan unit, said flow-guiding duct being oriented toward said angle in such a manner to form said flow direction for guiding said airflow toward the lamp module in order to cool the lamp module, wherein said flow-guiding duct further has an air outlet that is opposite to said air inlet and adapted to be located adjacent to the lamp module, said flow-guiding duct further including a collecting duct portion having a distal end defining said air inlet so as to collect air from said axial fan unit into said flow direction, and a guiding duct portion extending integrally from said collecting duct portion and having a distal end defining said air outlet for cooling the lamp module, and wherein said collecting duct portion of said flow-guiding duct extends in a first direction in a horizontal plane and further cooperates with said axial direction projected onto the horizontal plane to define a first acute angle therebetween, said collecting duct portion of said flow-guiding duct extending in a second direction in a vertical plane perpendicular to the horizontal plane and further cooperating with said axial direction projected onto the vertical plane to define a second acute angle therebetween.