A cooling device for a reflective liquid crystal image kernel has an air duct
unit
on the external case, which is separated into front and rear end ducts and has
an axial fan blowing downward. A guide plane has both of its lateral sides aslant
downward to guide part of the air flow blown from the axial fan to the split air
duct of each light valve on the outer side of the air duct unit to cool the outer
surface of three light valves fixed on the outer case of the kernel. The air blown
downward from the axial fan passes through the front and the rear air ducts of
the air duct unit directly, and passing through the ventilation holes of the external
case into the optical components such that a single fan is used to enhance heat
dispersion and reduce noise.
