Trapezoidal greenhouse solar chimney ventilation system

Abstract

The invention provides a trapezoidal greenhouse solar chimney ventilation system. The system comprises a solar chimney arranged on the wall body at one side of a greenhouse, an outdoor air inlet in the lower end of the solar chimney and an indoor air inlet of which the upper end is communicated with the upper end of the side wall of the wall body; the system further comprises a plurality of air supply outlets with different sizes formed in the top of the greenhouse and an exhaust outlet in the bottom of the wall body at the other side of the greenhouse. The trapezoidal greenhouse solar chimneyventilation system has the advantages that the hot pressing effect of the solar chimney is utilized, the indoor air inlet and the air supply outlets in the top of the greenhouse send hot air into thegreenhouse so as to make up for the lack of heat in the greenhouse in winter and provide a better growth micro-environment for fruits and vegetables; the air supply outlets with different sizes makethe distribution of the temperature in the greenhouse is more uniform, and the air supply outlets with variable sizes can also reduce the total pressure of a draught fan and reduce the energy consumption of the entire ventilation system.

Description

technical field [0001] The invention relates to a ventilation system for increasing the temperature of a greenhouse in winter, in particular to a solar chimney ventilation system for a trapezoidal greenhouse. Background technique [0002] Greenhouse is an important modern agricultural measure, and it is also a complex microenvironmental ecosystem, so it needs a suitable crop environment to adapt to its growth. Common greenhouses often adopt an artificial frame-covered structure in which one or more layers of thermal insulation plastic film are covered on the skeleton of a bamboo-wood structure or a steel structure. Same as the greenhouse effect, the film prevents a large amount of long-wave radiation in the shed at night, thus forming an independent greenhouse space so that the shed can have good temperature protection during the day and night. In addition, the outer membrane can effectively prevent the loss of carbon dioxide produced by the respiration of fruits and vegeta...

AI Technical Summary

Problems solved by technology

However, covering these opaque materials will not only reduce the incident solar radiation during the day, but also affect the photosynthesis of plants, resulting in a decrease in the temperature in the shed and inhibition of crop growth.

In addition, the structure of the conventional greenhouse is characterized by its long length, and the uneven distribution of solar radiation in the morning and evening, which makes the uneven distribution of heat along the length of the greenhouse, resulting in different heating of the growing areas of fruits and vegetables in the greenhouse, which affects the quality of their growth.

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