| 摘要 |
A natural ventilation window and automatic ventilator for plastic greenhouse is provided to improve warm-keeping effects and to allow the flow of the air in and out through one window and forcedly circulate the air during the operation of the ventilator to save energy. A natural ventilation window and automatic ventilator for plastic greenhouse comprises a rainwater inflow preventing portion(1a), an outer vinyl fastening groove(1c) and an outer skin fastening band. An outer vinyl-based skin is held by the outer skin fastening band. An inner vinyl-based skin is held by an inner skin fastening band. A display cover(2) and a rod(1g) induce the outdoor cold air not to be in contact with crops. The inner warm air is flowed through the opposite side of the display cover and the rod and discharged through the cover. When the cover is opened or closed, an opening and closing pulley is rotated by an opening and closing rope to reduce the power consumption. |
