| 摘要 |
FIELD: agriculture.SUBSTANCE: invention relates to agriculture and is intended for use as heat-insulating translucent cover of greenhouses and interior gardens. The cover for greenhouse comprises a number of vacuum bags containing translucent sheets of monolithic polycarbonate, spacers and tubulations. The tabulations of the vacuum bags are connected with common pipeline provided with a pressure sensor. The pipeline is connected to the pumping system operating in automatic mode. The spacer has the shape of an extended triangular prism which edges are parallel to one side of the sheet. Two edges of the prism coincide with the surface of the polycarbonate sheet and belong to it. The package sheets are unfolded towards each other by 90° and contact each other at the intersection points of edges of prisms, which form the spacers and do not belong to the sheet surface.EFFECT: calculated level of heat transfer resistance of the vacuum bag is maintained for the entire period of operation, heat loss through the spacers is reduced.2 dwg |
