Glass greenhouse system utilizing light guide shutter insulation board

Abstract

A glass greenhouse system utilizing a light guide shutter insulation board comprises a north wall, an east-west gable wall, a single-slope glass lighting ceiling with a high north and a low south, a glass lighting south wall and a truss for bearing the glass ceiling, and is characterized in that a shutter type inner ceiling with the light guide shutter insulation board capable of being turned overis arranged at the position close to the glass lighting ceiling, wherein a reflecting layer is attached to the surface of the light guide shutter insulation board, and the light guide shutter insulation board is installed on a truss or a supporting component connected with the truss through a rotating shaft; a light guide shutter insulation board rotation driving motor and a speed reducer are installed in the greenhouse, and a motor rotation controller is arranged inside or outside the greenhouse. The glass greenhouse system has the positive effects that greenhouse illumination can be redistributed, the heat loss of the greenhouse is reduced, and the temperature control capacity of the greenhouse is improved. The natural ventilation capacity is improved, and the ventilation energy consumption is reduced.

Description

technical field [0001] The invention belongs to the field of agriculture, and in particular relates to crop planting and cultivation greenhouses. Background technique [0002] The existing glass greenhouses still have some deficiencies in the utilization of solar thermal energy, mainly including: [0003] 1. Half-slope type (with a low wall at the south end), horizontal and semi-underground solar glass greenhouses, when the solar elevation angle is low in winter, a shading area will be formed at the southern end of the greenhouse, and a rich area will be formed on the north wall of the greenhouse. Light area (the light intensity per square meter is greater than that of the surface cultivation area). Regarding the utilization of the light source in the light-rich area of ​​the north wall, some areas adopt the method of adding a reflector to the north wall to reflect the sunlight to the farming surface at the front end of the north wall. Although it improves the photosynthes...

AI Technical Summary

Problems solved by technology

Although it improves the photosynthesis of crops in the northern part of the cultivated area, it cannot solve the problem of shading in the southern part of the cultivated area

[0004] 2. The Dutch glass greenhouse has a large space and a long depth. When the temperature is high in summer, it is necessary to use a large fan to increase the lateral air flow, resulting in a huge energy consumption of the fan. This is an urgent technical issue for large glass greenhouses in the north.

[0005] 3. The Dutch glass greenhouse has a large heat dissipation surface, and the cost of heating energy consumption in winter is high

Existing problems: First, the inner insulation curtain adopts the electric horizontal opening and closing method, and the insulation curtain material is required to be scalable and foldable, thus restricting the thickness of the curtain and increasing the coefficient of heat conduction; second, although the air interlayer buffers the heat loss caused by convection , but because the air interlayer cannot be fully enclosed, the cooled air interlayer will still pass through or bypass the insulation curtain material to affect the air temperature in the greenhouse, re-forming a heat dissipation path from high to low

When the outer roller blind is lowered at night, the heat loss caused by heat conduction and convection is significantly reduced, but the heat loss by long-wave radiation is not reduced

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