Ventilation system and method for controlling local CO2 concentration of plants in sunlight greenhouse

A technology of solar greenhouse and ventilation system, applied in the field of solar greenhouse, can solve problems such as affecting photosynthesis and deficit, and achieve the effect of avoiding large-scale occupation, preventing CO2 leakage, and realizing effective utilization.

Pending Publication Date: 2022-04-01
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the technical problems existing in the prior art, the present invention provides a partial CO 2 Concentration control ventilation system and method to solve the current environmental regulation of solar greenhouses mainly rely on manual experience regulation, the existing ventilation methods are likely to cause CO in the greenhouse 2 deficits, technical issues affecting photosynthesis

Method used

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  • Ventilation system and method for controlling local CO2 concentration of plants in sunlight greenhouse
  • Ventilation system and method for controlling local CO2 concentration of plants in sunlight greenhouse
  • Ventilation system and method for controlling local CO2 concentration of plants in sunlight greenhouse

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Embodiment 1

[0071] as attached Figure 1-2 As shown, the present embodiment 1 provides a kind of solar greenhouse plant partial CO 2 Ventilation system with concentration control, including soil-air heat exchange mechanism 1, fresh air pipe 2, return air pipe 4, several air supply devices 5, fan 6, static pressure box 7, CO 2 Supplementary valve 8, CO 2 Storage tank 9, air temperature and humidity sensor, CO 2 Concentration sensor and soil temperature sensor.

[0072] The soil-air heat exchange mechanism 1 is laid below the ground of the solar greenhouse 12, and is located in the constant soil temperature zone 2m below the ground; the soil-air heat exchange mechanism 1 extends to the outside of the solar greenhouse 12, and the soil-air heat exchange mechanism 1 The extension end is provided with an air inlet; the air inlet is located outside the lower end of the daylighting surface of the solar greenhouse 12; the soil-air heat exchange mechanism 1 is also provided with some air outlets...

Embodiment 2

[0094] as attached image 3 As shown, the structure and principle of this embodiment 2 are basically the same as that of embodiment 1, the difference is that in this embodiment 2, the static pressure box 7 is not provided; that is, the fresh air pipe 2 and the CO 2 The storage tanks 9 are directly connected by pipelines, and the CO 2 The replenishment valve 8 is set on the pipeline; through the fresh air pipe and the CO 2 Set up CO between storage tanks 2 make-up valve, through the CO 2 The opening and closing control of the supplementary valve realizes the control of CO 2 Intermittent control of the replenishment process, improving CO 2 Flexibility in the replenishment process.

[0095] in CO 2 The opening and closing valve is installed at the filling port. The initial interval of the opening and closing valve is 5s. After two monitoring periods, if the monitored concentration value is lower than 800ppm, the gap of the valve will often increase by [(800-x) / 100]s; After...

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Abstract

The invention discloses a sunlight greenhouse plant local CO2 concentration control ventilation system which comprises a soil-air heat exchange mechanism, and the soil-air heat exchange mechanism is laid under the ground of a sunlight greenhouse and located in a soil temperature constant area; the fresh air pipe is vertically arranged at an air inlet of the soil-air heat exchange mechanism; the air supply pipes are vertically arranged at an air outlet of the soil-air heat exchange mechanism, the air return pipe is vertically arranged at an air return opening of the soil-air heat exchange mechanism, and the fan is arranged in the soil-air heat exchange mechanism and is close to the position between the air outlet and the air return opening of the soil-air heat exchange mechanism; a CO2 supplementing opening is formed in the fresh air pipe, and the outlet end of the CO2 storage tank is connected with the CO2 supplementing opening of the fresh air pipe; according to the device, efficient supplementation of CO2 in the sunlight greenhouse is met, photosynthesis of plants is effectively promoted, the CO2 concentration outside a plant planting area is not affected, and the safety of operators is ensured.

Description

technical field [0001] The invention belongs to the technical field of solar greenhouses, in particular to a partial CO 2 Ventilation system and method for concentration control Background technique [0002] Solar greenhouses can use artificial facilities to adjust indoor light, temperature, humidity and CO 2 Concentration, etc., has become one of the main forms of modern agriculture; the solar greenhouse can improve the yield and quality of crops through the regulation of the indoor environment; at present, the solar greenhouse mainly used is in the form of a single slope, and one wall is a thermal storage wall; On the other side, a film is set as the lighting surface, and it is covered with thermal insulation materials at night; the environmental control of the above-mentioned greenhouse mainly relies on manual experience control, which cannot achieve precise control. [0003] Plants absorb CO through photosynthesis 2 Carbon sequestration is an indispensable link to ach...

Claims

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Application Information

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IPC IPC(8): A01G9/18A01G9/24
CPCY02A40/25Y02P60/14
Inventor 齐迪李安桂赵创要
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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