Design of an automatic opener of the greenhouse end windows

摘要

Invention provides a design for ventilation of a greenhouse, which comprises a design of automatic opener of the rear windows. The automatic opener of the rear windows comprises a piston rod in a cylinder containing substance expanding and contracting because of temperature, the rod is connected to a certain point of a pivotable metal rod. Another point of the metal rod is pivotably connected to the horizontal beam of the greenhouse framework. From the ends of the metal rod ropes extend to the rear windows, so that movement of the piston rod causes the rear windows to open or close. The rear windows have pivotable hinges provided with springs, so that in normal position the rear windows are closed.