REFLECTING PLATE FOR SOLAR-HEAT COLLECTING DEVICE

摘要

A reflecting plate for a solar-heat collecting device is provided to prevent performance deterioration of incident light reflecting performance of the reflecting plate by expelling dust deposited on the surface of the reflecting plate through an incised part. A solar-heat collecting device comprises a collecting tube(200) formed with a double glass tube, and a reflecting plate(100) where parabola is formed continuously, spaced by specific distance from the collecting tube. The reflecting plate has the center part incised where incident light is illuminated due to interference of the collecting tube according to angle of incident. The collecting tube consists of an inner vacuum tube(210), of which on the outer surface, selective absorbing film(211) for absorbing is coated; and an outer vacuum tube(220) surrounding the inner vacuum tube.