DEVICE FOR PROTECTION OF PLANTS FROM CONTACTING AIR OF SUBZERO TEMPERATURE Russian patent published in 2010 - IPC A01G13/06 

FIELD: agriculture.

SUBSTANCE: invention relates to agricultural industry, in particular to devices for protecting plants from the spring night air. The device contains a cylinder, a fan, a movable and basic frame mounted in the upper and lower parts of the cylinder respectively. The cylinder is made with elastic rings and heat-insulation, and flexible barriers forming chambers are installed inside it. Ejectors are located inside the cylinder, they have the form of a truncated cone, which are installed with a gap one behind another. The first ejector is connected to the movable frame, and the longitudinal axis of the ejectors coincides with the longitudinal axis of the cylinder. The hinge is fixed on the movable frame, through which it is connected with the driving drum with flexible thread. The fan creates an air stream which is mixed with air supplied from the chambers, and the created flow enters the windows placed at the bottom of the cylinder. Exhaust channel are tightly attached to the windows, there are through holes along their longitudinal axis, serving to supply air to the plants.

EFFECT: decrease of energy demands for the air supply of above-zero temperature under excess pressure to plants.

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