DEVICE FOR REGULATION OF AIR TEMPERATURE IN HOTHOUSE Russian patent published in 1995 - IPC

FIELD: agriculture. SUBSTANCE: device comprises a revolving frame movable vertically in a carcass, a drum of a cable-and-block system disposed on the frame rotation axis passing through the frame center of gravity, and a heat-sensitive element acting as a turning drive of the frame and secured on rotation axis. Said element is made from a material possessing a shape memory effect, said material based on titanium-nickel-copper alloy with the following relation of components, wt/% titanium, 44.99; nickel, 300.92-34.43; copper, 10.64-14.15. EFFECT: device maintains air temperature in hothouse in required limits, raises accuracy of regulation of this parameter of microclimate in hothouse and, consequently, increases productivity of grown plants. 3 cl, 3 dwg, 1 tbl