| 摘要 |
PURPOSE: An apparatus is provided to open/close a curtain using the temperature difference depending on the variation of a sunlight percentage, thus keeping an agreeableness indoor space and devising the saving of energy. CONSTITUTION: The apparatus for opening/closing a curtain using a temperature difference depending on the variation of a sunlight percentage comprises a cylindrical case(2), at least one end thereof being open; a convex lens(3) adapted to block an opening of the cylindrical case; a first temperature sensor(4) installed inside the cylindrical case to detect the variation of an inside temperature; a second temperature sensor(5) installed at the outside of the cylindrical case to detect the variation of an outside temperature; a controller(8) for determining a movement direction of the curtain on the basis of a temperature difference determined by comparing temperature detecting signals from the sensors and rotating a driving motor(10) forwardly and backwardly in accordance with the determined results; and a limit switch for detecting and inputting a movement state of the curtain.
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