HOTHOUSE VENTILATION SYSTEM Russian patent published in 1995 - IPC

FIELD: agriculture. SUBSTANCE: hothouse ventilation system has a roof framework with trays, roof ridges, and small window air vents linked with their drives. The ventilation system is provided with additional ridge and tray belt air vent small windows mounted on under-window shafts for rotation. There are sensors of their overload. The longitudinal edges of the trays are bent away. The ridge small air vent windows are arranges both sides of the ridges, and their upper edges are bent to rest on the bent longitudinal edges of the trays. Other edges are bent toward the roof framework. The overload sensors ate located at the bent edges of the trays and edges of the ridge and tray small air vent windows. The shafts are engaged with the drive by means of chain transmissions. EFFECT: higher system effectiveness; convenience in operation. 3 cl, 2 dwg