Roof-windowing single-span plastic greenhouse

Abstract

The invention relates to a roof-windowing single-span plastic greenhouse, belonging to the technical field of plastic greenhouses. The roof-windowing single-span plastic greenhouse is characterized in that one long arch bar and one short arch bar are connected through a connecting piece to form a single arch frame, and the long arch bar and the short arch bar which are arranged at the two sides of the single arch frame and are different in length form a vertical roof ventilating window on the top of the single arch frame; the single arch frames are longitudinally connected on the top of the long arch bars by virtue of a main longitudinal rod to form a main arch frame of the greenhouse; a plastic film is covered on the main arch frame to form the plastic greenhouse; and side ventilating windows are arranged at the two sides of the lower part of the greenhouse. In the roof-windowing single-span plastic greenhouse, the vertical roof ventilating window is arranged on the top of the greenhouse and is matched with the side ventilating windows at the lower part so as to form better hot pressure ventilation effect, thus natural ventilation also can be realized only by utilizing hot pressure even under the windless external condition. In routine production, as the hot pressure ventilation capability is increased, the natural ventilation property of the single-span greenhouse is obviously improved under the combined action of wind pressure and the hot pressure so that the temperature in the greenhouse can not be too high, thus meeting the requirement for crop growth.

Description

technical field [0001] The invention belongs to the technical field of plastic greenhouses, in particular to a single-building plastic greenhouse of a top-opening window type. Background technique [0002] At present, the conventional single-building greenhouse ventilation system adopts the form of bottom ventilation windows on both sides, and there is usually no ventilation window at the top of the greenhouse. [0003] The usual natural ventilation is based on the principle of wind pressure and thermal pressure. Since the conventional single-building greenhouse only has ventilation windows on both sides of the low position, the driving force of natural ventilation mainly depends on the external wind pressure. Since there is no ventilation window at the top, the heat in the greenhouse is easy to accumulate on the top of the greenhouse, resulting in high temperature in the greenhouse and difficulty in production in summer. SUMMARY OF THE INVENTION [0004] In view of the a...

AI Technical Summary

Problems solved by technology

Since there is no ventilation window on the top, the heat in the greenhouse is easy to accumulate on the top of the greenhouse, resulting in high temperature in the greenhouse and difficult production in summer, etc.

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