| 摘要 |
<p>To conveniently switch an opening or closing condition of a heat-retaining curtain equipped in a greenhouse and prevent damage to the heat-retaining curtain caused by a malfunction when the opening or closing condition is switched, the present invention provides a tunnel-type heat-retaining curtain opening and closing system including: a winding roll which is connected with first and second towing lines which are wound in different rotary directions and are connected with a heat-retaining curtain covering the top of a small greenhouse; and a motor which rotates the winding roll. The tunnel-type heat-retaining curtain opening and closing system comprises: an operating switch unit which receives an operation command inputted to open and close the heat-retaining curtain; a limit switch unit which controls a rotary angle with respect to each rotary direction of the winding roll; a control unit which rotates the motor in a set rotary direction according to an operation signal corresponding to the inputted operation command, reflects the rotary direction of the motor according to a stop signal of the limit switch unit, and stops the motor after a pre-determined period of rotary time passes; and an ROM saving unit which saves an opening and closing conversion state value about the opening and closing conversion progress and opening and closing completed state of the heat-retaining curtain and an opening and closing state value about the opening and closing states of the heat-retaining curtain.</p> |
