HOTHOUSE Russian patent published in 1996 - IPC

FIELD: agriculture. SUBSTANCE: hothouse has sectioned two-tier housing. Upper detachable tier is formed by roof with two sloping surfaces having apex angle of 90-110 deg and side walls. Lower tier has two supporting casings, each defined by wall with two sloping surfaces and inner walls. Outer angle between side wall of upper tier and upper sloping surfaces of side wall of supporting casing is equal to angle between sloping surfaces of lower tier side wall and makes 145-155 deg. Each side supporting member is formed as corner with angle between strips equal to 109-118 deg. Housing width and height ratio is 1.48-1.67. Height of lower tier is constant and upper tier may have different sizes. Coupled frames are mounted transverse to roof for automatic opening by thermal cylinders. EFFECT: increased efficiency and enhanced reliability in operation. 3 cl, 3 dwg