Northern vegetable sunlight greenhouse with three layers of greenhouse films

Abstract

The invention discloses a northern vegetable sunlight greenhouse with three layers of greenhouse films. The northern vegetable sunlight greenhouse comprises a cold-proof layer, a front wall, a day lighting roofing, an internal steel pipe layer, a greenhouse top point, a rear roofing, a cob wall, a cotton quilt and an electric rolling blinds machine, wherein the orientation of the sunlight greenhouse is 5-8 degrees westwards; the day lighting roofing comprises the internal steel pipe layer, a middle steel pipe layer and an external steel pipe layer; the span from the front wall to the cob wall is 7-9m; the front wall is taken as a starting point in the greenhouse; for positions of 0.5-1.5m, 1.5-2.5m, 2.5-3.5m, 3.5-4.5m, 4.5-5.5m, 5.5-6.5m and 6.5-7.5m from the front wall, the corresponding roofing day lighting angles alphas are 53-57 degrees, 48-52 degrees, 43-47 degrees, 38-42 degrees, 33-37 degrees, 28-32 degrees and 23-27 degrees; the height from the greenhouse top point to an indoor ground plane is 4.4-4.6m; the section of the cob wall is trapezoidal; the elevation angle between the top part of the cob wall and the interior of the greenhouse roofing is 63-67 degrees; and the base angle located in the greenhouse is 80-90 degrees.

Description

technical field [0001] The invention relates to a solar greenhouse, in particular to a three-layer solar greenhouse for vegetables in the north. Background technique [0002] The solar greenhouse is an agricultural planting facility for growing vegetables in the cold season. Generally, vegetables are cultivated for overwintering without heating. Under the condition of no heating, the source of the temperature in the greenhouse mainly depends on the direct radiation and diffuse radiation of the sun, which shines through the film to the ground and Insulation walls, in turn, increase the indoor temperature, so the size of each part of the greenhouse must be designed according to the angle of altitude, latitude and sunlight, especially the size of the lighting surface angle of the greenhouse and the inward angle of the slope of the rear roof. Heat plays an important role. At present, the problem of heat preservation and heat storage in many solar greenhouses is mainly to use new...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problems existing in the above-mentioned products, and provides a three-layer shed film northern vegetable solar greenhouse to solve the above-mentioned problems. Unreasonable design will lead to certain limitations in the lighting and heat preservation capabilities of the greenhouse. At the same time, most of the traditional solar greenhouses are double-layer shed film, and the heat preservation performance is not high.

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