Desert greenhouse control method and system

Abstract

The present invention relates to a desert greenhouse control method and a system. The system comprises: a main unit, used for constructing a greenhouse space for growing crops; a ventilation unit used for exchanging air between the greenhouse space and the outside space; and a temperature maintaining unit used for adjusting the temperature and the temperature distribution in the greenhouse space. In the greenhouse system, ventilation and temperature maintaining working conditions acting on the greenhouse space are formed by means of at least ventilation parameters of the ventilation unit and temperature maintaining parameters of the temperature maintaining unit. In response to a plurality of trigger signals, the greenhouse system updates and adjusts the ventilation and temperature maintaining working conditions by changing the ventilation parameters and temperature maintaining parameters. According to the control method and the system of the present application, by means of structural configurations and control and adjustment, the problem of obviously uneven heat distribution in space and time of greenhouse systems in desert and Gobi areas is solved, and the positive support level of the greenhouse system for crop growth and the capacity thereof to resist against and adapt to changes in desert and Gobi environments are improved by means of adaptive control of the temperature maintaining and ventilation working conditions.

Description

A desert greenhouse control method and system Technical Field

[0001] The present invention relates to the field of plant planting technology, in particular to the field of greenhouse planting technology, and specifically to a desert greenhouse control method and system. Background Art

[0002] The precipitation in desert areas and semi-desert Gobi areas is extremely low and the evaporation is extremely high, resulting in low soil moisture content and basically no vegetation cover. The soil that can be used for agricultural planting is mainly quicksand soil matrix. The above-mentioned areas have good light, heat and space resources, and the greenhouse can be used to configure or adjust resources such as light, heat and water to construct an environment suitable for crop growth. However, greenhouse agricultural production and planting in the above-mentioned areas still face many challenges, including: (1) water resource shortage. The annual precipitation in desert areas is usually less than 100 mm, while the evaporation is as high as more than 2000 mm. The agricultural production and planting process requires a large amount of additional irrigation water, and the transportation cost is extremely high; (2) soil matrix limitations. The desert quicksand soil matrix has poor water and fertilizer retention capacity and is prone to water and fertilizer leakage. Continuous irrigation and fertilization or a shorter irrigation and fertilization cycle is required to avoid water and fertilizer stress during planting production; (3) The unstable planting environment, including wind and sand erosion and temperature changes. Deserts and Gobi areas have a harsh wind and sand climate environment. Wind and sand erosion will cause direct mechanical damage to crops, affecting their photosynthesis and physiological functions. Greenhouses can resist wind and sand erosion and keep them warm and ventilated.

[0003] Regarding the problems of water shortage and soil matrix limitations, existing technologies construct a stable environment by setting up greenhouses with controllable internal environments. Greenhouses can be arranged near water sources (such as desert Gobi near oases) to reduce water resource transfer losses and costs, and also facilitate the transportation of finished products. Greenhouses can also improve the internal soil matrix to improve water and fertilizer storage capacity.

[0004] Regarding factors that make the planting environment unstable, such as wind and sand erosion and temperature changes, the prior art patent CN105557394B discloses a greenhouse facade ventilation and insulation device, which includes a wind-resistant guide mechanism, a window, a lifting mechanism, and a connecting member. The device controls the window to flatten upward or contract downward along the wind-resistant guide mechanism through the lifting mechanism, thereby achieving the opening and closing adjustment of the window arranged inside the greenhouse. However, this opening and closing adjustment structure can only control the size of the window opening and closing, but cannot guide and control the direction of air circulation. Especially when it is necessary to form an effective circulation or heat exchange convection inside the greenhouse, guiding and controlling the direction of air circulation is of great significance for ensuring ventilation effect and reducing wind and sand erosion.

[0005] Patent publication number CN108834685B discloses a solar greenhouse ventilation and heat recovery system and a solar greenhouse equipped with the system. The patent's solution is to transfer heat to maintain the greenhouse temperature by setting up a solar heat storage structure in the greenhouse, which is used to solve the problem of large temperature difference between day and night or the need for artificial warming in the greenhouse in winter. However, the greenhouse system does not take into account the situation where the heat obtained by the greenhouse has obvious uneven characteristics in space and time due to changes in sunshine and weather and climate change.

[0006] Based on the above content, the desert Gobi area has the characteristics of high temperature and dryness, large temperature difference between day and night, and obvious differences in climate change in the four seasons. The agricultural planting process in the desert Gobi area puts higher requirements on the ventilation and insulation performance of the greenhouse. For example, the greenhouses in the existing technology rarely consider the dynamic changes in the flow direction and flow parameters of heat carrying media such as air and the adaptive adjustment between the ventilation and insulation devices of the greenhouse. Especially when the heat obtained by the greenhouse due to changes in sunshine weather and climate change is obviously uneven in space and time, relying on the greenhouse structure setting and the control and adjustment of the internal environmental parameters of the greenhouse to adapt to the changes in sunshine climate and air flow to enhance the positive support level for crop growth and the ability to resist and adapt to changes in the desert Gobi environment is of great significance to the economic applicability of greenhouses in desert Gobi and other areas.

[0007] In particular, in desert environments, greenhouses face a complex mix of cyclical factors, such as changes in external sunlight angle, and sudden changes in weather. Environmental parameters suitable for crop growth in greenhouses must maintain a periodic nature, requiring specific cyclical environmental parameters for each stage of crop growth. Consequently, an automated greenhouse system and automated greenhouse control method are urgently needed that can adapt to these internal and external factors and implement intelligent and economical control.

[0008] In addition, on the one hand, there are differences in understanding among those skilled in the art; on the other hand, the inventor studied a large number of documents and patents when making the present invention, but due to space limitations, not all details and contents are listed in detail. However, this does not mean that the present invention does not have the characteristics of these prior arts. On the contrary, the present invention already has all the characteristics of the prior art, and the applicant reserves the right to add relevant prior art to the background art.

[0009] Summary of the Invention

[0010] In response to at least some of the shortcomings of the prior art, the present application proposes a desert greenhouse control method, which includes: constructing a greenhouse space for accommodating crop growth and isolating the greenhouse space from the outside space by at least using a building frame structure; exchanging air between the greenhouse space and the outside space and adjusting the temperature and temperature distribution in the greenhouse space; forming a ventilation and insulation working condition acting on the greenhouse space based on ventilation parameters for indicating the flow state of the air exchange process and insulation parameters for adjusting the temperature and temperature distribution; changing the ventilation parameters and the insulation parameters to update and adjust the ventilation and insulation working condition in response to a signal that a number of first flag information collected from the greenhouse space does not match the preset flag information and / or in response to a signal that a number of second flag information collected from the outside space reaches a change threshold condition.

[0011] In order to overcome the lack of effective regulation of insulation and ventilation conditions in the existing technology to improve the positive support level of greenhouse systems arranged in desert Gobi areas for crop growth and their ability to resist and adapt to changes in the desert Gobi environment, and to rely on structural settings and control adjustments to solve the problem of obvious uneven heat distribution in space and time in greenhouse systems in desert Gobi areas, the regulation method of this application is provided with corresponding flexible and adjustable ventilation and insulation conditions according to growth needs. The ventilation and insulation conditions can adapt to changes in the greenhouse space and external space by adjusting ventilation parameters and insulation parameters, thereby providing a suitable greenhouse environment for crop growth.

[0012] Especially for greenhouse systems arranged in desert Gobi areas, factors such as drastic changes in environmental parameters and wind and sand erosion pose great challenges to the greenhouse system's operating condition control capabilities and wind and sand resistance capabilities. In particular, factors with periodic characteristics such as changes in sunlight angle and sudden factors such as weather changes will have a compound effect on the greenhouse space, that is, the control and adjustment of ventilation and insulation conditions need to comprehensively consider the first mark information collected in the greenhouse space and the second mark information collected in the external space. The comparison result of the first mark information and the preset mark information is used to measure the degree to which the status information in the greenhouse space deviates from the set standard, and the comparison result of the second mark information and the change threshold condition is used to measure the degree to which the ventilation and insulation conditions need to be adjusted due to changes in the status information of the external space. The control method of the present application can achieve a flexible and accurate ventilation and insulation condition adjustment process through the above-mentioned adjustment control, which can significantly improve the positive support level of greenhouse systems arranged in desert Gobi areas for crop growth and their adaptability and resistance to changes in the desert Gobi environment.

[0013] Therefore, the environmental parameters in the greenhouse space can be set according to several stages of crop growth and maintained or adjusted in stages by controlling and adjusting the ventilation and insulation working conditions consisting of at least ventilation parameters and insulation parameters, so that the control and adjustment of the ventilation and insulation working conditions can adapt to the influencing factors with periodic characteristics such as changes in sunlight angles by basic periodic control adjustments and superimpose temporary control adjustments to adapt to the influencing factors with sudden characteristics such as weather changes, thereby realizing intelligent and economical greenhouse regulation.

[0014] For example, greenhouses can control the direction or distribution of air circulation through active equipment or passive structures, or transfer and store excess heat to make up for the spatial and temporal heat gap in the greenhouse. The ventilation and insulation structure can be adjusted according to the growth needs of crops, sunlight angle, internal and external temperature, wind direction and wind intensity, so that the greenhouse can overcome the defects of uneven heat distribution in the desert environment and the easy changes in parameters that are far beyond the range suitable for crop growth, and provide crops with ventilation and insulation effects suitable for current growth needs.

[0015] In the present application, the ventilation parameters used to indicate the flow state of the air exchange process include at least: ventilation flow rate and ventilation path. The insulation parameters used to adjust the temperature and temperature distribution include at least: introduction temperature and exhaust temperature. The first flag information collected in the greenhouse space may include the air composition information and internal temperature of the greenhouse space. The preset flag information is set with a reference standard corresponding to the first flag information, and the reference standard can be expressed in the form of a numerical range. The second flag information collected in the external space may include sunshine information, weather information, and external temperature. The change threshold condition refers to the setting condition for changing the ventilation and insulation working conditions of the greenhouse system according to the change amplitude of the external space environmental factors.

[0016] Preferably, the control method further includes: collecting first indicator information from the greenhouse space to indicate the growth environment of crops within the greenhouse space; and providing preset indicator information suitable for crop growth based on at least empirical crop growth data and serving as a reference standard for the first indicator information, wherein the preset indicator information is set to a numerical range that changes with diurnal changes and crop growth stages. Furthermore, if the first indicator information collected from the greenhouse space exceeds the numerical range corresponding to the preset indicator information, the ventilation and insulation operating conditions are adjusted by changing the ventilation and insulation parameters to control the first indicator information to return to the numerical range corresponding to the preset indicator information.

[0017] The comparison result between the first flag information and the corresponding preset flag information is used to indicate the situation where the actual state in the greenhouse space deviates from the set state, so that through the above-mentioned control adjustment process, it is ensured that the greenhouse space can provide crops with ventilation and insulation conditions that change according to the set state and are allowed to fluctuate within a certain range, thereby ensuring the positive support effect of ventilation and insulation conditions on crop growth.

[0018] Preferably, in response to a signal indicating that the carbon dioxide concentration in the air component information of the first flag information exceeds the upper limit of the numerical range set by the corresponding preset flag information, the ventilation flow and ventilation path are adjusted by the ventilation unit to restore the carbon dioxide concentration at each location in the greenhouse space to the numerical range set by the preset flag information.

[0019] Preferably, the control method further includes: collecting the second flag information from the external space for indicating the external environment in which the greenhouse system is located, setting a change threshold condition for implementing intervention based on the second flag information based on at least historical environmental data, and adjusting the ventilation and insulation conditions when the second flag information reaches the corresponding change threshold condition. Furthermore, adjusting the ventilation and insulation conditions when the second flag information collected from the external space reaches the corresponding change threshold condition includes: adjusting the ventilation parameters and the insulation parameters to transfer heat transferred to the greenhouse system in a non-uniform manner by the sun when the change in the sunlight angle reaches the change amplitude set by the corresponding change threshold condition. Furthermore, in response to a signal in the second flag information that the sunlight intensity reaches a first set value and the sunlight angle changes by a second set value, the ventilation path is adjusted by the ventilation unit so that the air flowing along the ventilation path acts concentratedly on the direct sunlight area of ​​the greenhouse system.

[0020] Preferably, adjusting the ventilation and insulation conditions when the second flag information collected from the external space reaches the corresponding change threshold condition may also include: when the change in the dust density in the air reaches the change amplitude set by the corresponding change threshold condition, adjusting the ventilation parameters to reduce the amount of dust that follows the air into the greenhouse space.

[0021] The comparison between the second flag information and the corresponding change threshold condition indicates the degree of influence of the external environmental parameters on the greenhouse space. Specifically, when the second flag information reaches the change threshold condition, the influence of the external environmental factors on the greenhouse space has significantly changed. Depending on the current ventilation and insulation conditions, the greenhouse space's first flag information may approach the boundary of the numerical range set by the preset flag information, resulting in the first flag information being within the permitted range but unable to provide optimal environmental parameters for the crops. Furthermore, changes in the greenhouse environment caused by changes in the first flag information require adjustments to the greenhouse's ventilation and insulation conditions to adapt to these changes and ensure that ventilation and insulation conditions operate within an economically efficient range.

[0022] Preferably, changing the ventilation parameters is performed at least in the following manner: adjusting the ventilation flow rate of air entering the greenhouse space from the external space and adjusting the ventilation path of the air flowing in the greenhouse space by controlling the flow direction of the air entering the greenhouse space, wherein adjusting the ventilation flow rate of air entering the greenhouse space from the external space is implemented by changing the size of the circulation cross-sectional area and / or changing the size of the circulation speed.

[0023] Preferably, the insulation parameters are changed at least in the following manner: the introduction temperature of the air entering the greenhouse space is adjusted by the ventilation flow rate in accordance with the ventilation parameters and the temperature distribution in the greenhouse space is adjusted by the ventilation path in accordance with the ventilation parameters, wherein the adjustment of the introduction temperature of the air entering the greenhouse space is implemented by exchanging heat with the air entering the greenhouse space.

[0024] The control and adjustment of ventilation and insulation conditions is implemented through the coordinated adjustment of ventilation and insulation parameters, comprehensively considering the impact of adjustments to ventilation and insulation parameters on environmental parameters within the greenhouse space. Ventilation and insulation conditions can be controlled and adjusted through passive structures and active equipment. For example, active equipment or passive structures can be used to control the direction or distribution of air flow, or to transfer and store excess heat to compensate for the greenhouse's spatial and temporal heat gaps. Ventilation and insulation structures can be adjusted based on crop growth needs, sunlight angles, internal and external temperatures, wind direction, and wind strength.

[0025] The present application also provides a desert greenhouse system, which includes: a main unit for constructing a greenhouse space for accommodating crop growth, wherein the main unit is used to isolate the greenhouse space from the external space by means of at least a building frame structure; a ventilation unit for exchanging air between the greenhouse space and the external space; an insulation unit for adjusting the temperature and temperature distribution in the greenhouse space; a control center for controlling the ventilation unit and the insulation unit to perform ventilation and insulation regulation on the greenhouse system, wherein the greenhouse system at least relies on the ventilation parameters of the ventilation unit for indicating the flow state of the air exchange process and the insulation parameters of the insulation unit for adjusting the temperature and temperature distribution to form ventilation and insulation working conditions acting on the greenhouse space; in response to a signal that several first flag information collected from the greenhouse space does not match the preset flag information and / or in response to a signal that several second flag information collected from the external space reaches a change threshold condition, the control center updates and adjusts the ventilation and insulation working conditions by changing the ventilation parameters and the insulation parameters.

[0026] Preferably, the ventilation unit is provided with a plurality of vents connecting the greenhouse space with the outside space. A first regulating assembly for adjusting the ventilation flow rate and a second regulating assembly for adjusting the ventilation path are provided on the side of the vents proximate to the greenhouse space. Furthermore, the insulation unit is provided with a third regulating assembly proximate to the vents for exchanging heat with air entering the greenhouse space. Heat exchange between the third regulating assembly and the air is achieved by varying the heat exchange temperature and / or heat exchange area between the third regulating assembly and the air. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG1 is a schematic diagram of the overall structure of a desert greenhouse according to an embodiment of the present invention;

[0028] FIG2 is a schematic diagram of the functional connection arrangement of a desert greenhouse according to an embodiment of the present invention.

[0029] Reference Signs List

[0030] 100: Main unit; 101: Support frame; 102: Ceiling; 103: Side wall; 200: Ventilation unit; 201: Vent; 202: First regulating component; 203: Second regulating component; 300: Insulation unit; 301: Heat storage unit; 302: Third regulating component; 400: Control center; 401: External monitoring unit; 402: Internal monitoring unit; 403: Interaction unit; A: External air; B: Internal air. DETAILED DESCRIPTION

[0031] Any directions specified in this application are provided for the convenience of the reader only and do not limit this application accordingly. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the invention.

[0032] The present invention will be described in detail below with reference to the accompanying drawings.

[0033] The present application provides a desert greenhouse control method and system, and in particular relates to an adaptively adjusted desert greenhouse control method and system, hereinafter referred to as the control method and system, which belongs to the field of greenhouse planting technology. The control method and system of the present application are intended to solve the problem of obvious unevenness in the spatial and temporal characteristics of heat distribution in greenhouse systems in desert Gobi areas and to improve the positive support level of the control method and system for crop growth and the ability to resist and adapt to changes in the desert Gobi environment based on the effective control of the thermal insulation and ventilation conditions, so that the control method and system of the present application can comprehensively consider the factors affecting the crop growth environment of the greenhouse space and the external space and implement intelligent adjustment of the ventilation and thermal insulation conditions, thereby providing a stable and suitable growth environment for crop growth through adaptive adjustment of changes in the external space and feedback control of unexpected changes in the greenhouse space.

[0034] For example, the main factors affecting crop growth in a greenhouse space may include air composition information and internal temperature. Air composition information is used to represent the gas composition in the greenhouse space, such as oxygen and carbon dioxide that affect photosynthesis and respiration. For example, the optimal carbon dioxide concentration for crop photosynthesis is 0.1% to 0.3%. A carbon dioxide concentration below 0.1% or above 0.3% will inhibit the photosynthesis intensity of the crop, but the carbon dioxide concentration in the air of the natural environment is usually around 0.04%. In addition, the optimal carbon dioxide concentration for photosynthesis varies for different crops. For example, for crops such as strawberries, watermelons, celery, and cucumbers, the suitable carbon dioxide concentration in the greenhouse is 0.1% to 0.13%. For crops such as tomatoes and peppers, the suitable carbon dioxide concentration in the greenhouse is 0.08% to 0.1%. The above concentration data are all mass concentrations. The internal temperature mainly considers the average temperature of the crop area in the greenhouse space and the temperature distribution obtained by several monitoring points. The temperature and temperature distribution have a specific range suitable for crop growth and will change periodically with the change of day and night and seasons. For example, the growth cycle of tomatoes is 110 to 170 days, and the suitable temperature during the day is 25 to 28 degrees Celsius, and the suitable temperature at night is 16 to 20 degrees Celsius.

[0035] The main factors affecting crop growth in the external space may include sunshine information, weather information and external temperature. Sunlight information refers to the sunshine angle and sunshine intensity. Changes in sunshine angle and sunshine intensity will cause uneven distribution of heat in the greenhouse system. For example, when the greenhouse system is arranged in a north-south direction, the position of direct sunlight in the greenhouse system will change with the change of sunshine angle, making the greenhouse system in most cases directly sunlit or partially sunlit. The heat generated by sunlight is concentrated in a local position of the greenhouse system, causing uneven heat distribution in the greenhouse space and causing high local temperatures in the greenhouse space. Especially in desert Gobi environments, localized continuous high temperatures can have an adverse effect on crop growth and even cause some crops to wither and die. Weather information may include air dust density, wind strength and direction. Weather information and external temperature will affect the quality of air introduced into the greenhouse space from the external space and the circulation status of air between the external space and the greenhouse space.

[0036] Especially for greenhouse systems arranged in desert Gobi areas, changes in sunlight conditions and surface conditions in the desert environment will cause drastic temperature differences, which will put higher requirements on the heat dissipation and insulation of the greenhouse system. In particular, the heat dissipation and insulation process needs to be combined with the ventilation process to form ventilation and insulation conditions suitable for the current growth stage of the crops, so that the relevant parameter settings of the ventilation and insulation conditions can adapt to drastic temperature differences and sunlight changes and provide a stable growth environment for the crops in the greenhouse system.

[0037] Therefore, the control method and system of the present application realize intelligent adjustment of ventilation and heat preservation working conditions by means of structural setting and control adjustment. Specifically, as shown in FIG1 , the greenhouse system of the present application is provided with a main unit 100 for constructing a greenhouse space for accommodating crop growth. The main unit 100 is at least separated from the outside space by means of a building frame structure. The main unit 100 defines the shape of the greenhouse space by means of a support frame 101, so that the main unit 100 is integrally formed by the support frame 101, or has a roof 102 arranged on the top of the support frame 101 and a side wall 103 arranged on the side of the support frame 101, so that the main unit 100 forms a regular shape with a roof 102 and a side wall 103 and forms a greenhouse space for growing crops inside it. For example, the main unit 100 includes a support frame 101 and a light-transmitting curtain or curtain wall wrapped around the outer periphery of the support frame 101. The curtain or curtain wall can use one or more of a polymer plastic film, glass and a brick-concrete structure, so that corresponding ventilation and heat preservation equipment can be arranged on the curtain or curtain wall according to functional needs.

[0038] To exchange air between the greenhouse space and the outside space, the greenhouse system is provided with a ventilation unit 200, which can achieve air exchange through passive structures and passive equipment. For example, as shown in Figures 1 and 2, a number of vents 201 are provided on the side walls 103 and ceiling 102 of the main unit 100. Under natural conditions, the air in the greenhouse space is heated and discharged from the vents 201 located on the ceiling 102. The decrease in pressure in the greenhouse space will attract air from the outside space into the greenhouse space through the vents 201 located on the side walls 103, thereby forming a natural circulation based on the passive structure. However, the ventilation volume generated by the above-mentioned natural circulation process is limited, making it difficult to apply to situations where a higher ventilation volume is required to meet ventilation and heat dissipation requirements. Therefore, the vents 201 of the present application can also be provided with corresponding active equipment, such as an induced draft fan or blower, so that the ventilation unit 200 can achieve forced circulation of air between the outside space and the greenhouse space through the above-mentioned active equipment.

[0039] Preferably, in order to effectively control the ventilation flow and ventilation path of the air, as shown in Figure 2, the ventilation unit 200 is provided with a plurality of first adjustment components 202 and second adjustment components 203 corresponding to the vents 201. The first adjustment components 202 are used to control the ventilation flow of the air at the vents 201, and the second adjustment components 203 are used to control the ventilation direction of the air at the vents 201 and the ventilation path of the air in the greenhouse space.

[0040] Specifically, the first adjustment assembly 202 is equipped with an opening adjustment mechanism and an active device (an induced draft fan or blower). The opening adjustment mechanism is used to change the flow cross-sectional area of ​​the vent 201, while the active device is used to change the flow velocity of the vent 201. The cooperation between the opening adjustment mechanism and the active device effectively adjusts the ventilation flow rate. The second adjustment assembly 203 is equipped with a plurality of deflectors with adjustable angles relative to the central axis of the vent 201. The deflectors are used to change the flow direction of air entering the greenhouse space from the vent 201. For example, the deflectors may include horizontal deflectors and vertical deflectors, so that the horizontal deflectors and the vertical deflectors can respectively control the flow direction of air relative to two mutually perpendicular planes.

[0041] To effectively control the temperature and temperature distribution within the greenhouse space, the greenhouse system is equipped with a thermal insulation unit 300. This unit can heat or cool the air entering the greenhouse space through the vents 201, thereby cooperating with the ventilation unit 200 to control the temperature and temperature distribution within the greenhouse space. Specifically, the thermal insulation unit 300 is equipped with a third regulating component 302 for exchanging heat with the air. This third regulating component 302 controls the heat exchange area and heat exchange temperature with the air, thereby effectively regulating the air temperature based on the heat exchange process. For example, the third regulating component 302 is configured as an electrically powered temperature-variable device, allowing it to adjust as needed within a set operating temperature range to vary the amount of heat exchanged with the air per unit time. Alternatively, the third regulating assembly 302 is connected to the heat storage unit 301, and the heat storage unit 301 is configured as an electrically driven temperature-variable device, enabling the heat storage unit 301 to store a medium and achieve temperature increases and decreases. The medium flows to the third regulating assembly 302 and exchanges heat with the air, allowing the heat storage unit 301 to transfer heat from the air and redistribute it temporally and spatially. For example, during the day, when the air temperature rises, the heat storage unit 301 absorbs heat from the air through the third regulating assembly 302 and stores it within the heat storage unit 301. At night, when the air temperature drops, the heat storage unit 301 returns the heat to the air through the third regulating assembly 302, and the heat is applied to the greenhouse space, thereby achieving temporal redistribution of heat. In conjunction with the control of the passage path by the second regulating assembly 203 of the ventilation unit 200, the above-mentioned heat absorption and release process of the heat storage unit 301 can also achieve spatial redistribution of heat, ensuring consistent environmental conditions within the greenhouse space.

[0042] Therefore, the greenhouse system can form ventilation and insulation conditions acting on the greenhouse space through the relevant parameter settings of the ventilation unit 200 and the heat exchange unit. The relevant parameters of the ventilation unit 200 are ventilation parameters, and the relevant parameters of the insulation unit 300 are insulation parameters, so that the greenhouse system can update and adjust the ventilation and insulation conditions by adjusting the ventilation parameters and insulation parameters, thereby ensuring that the ventilation and insulation conditions of the greenhouse system can adapt to environmental changes in the external space and provide a stable and suitable growth environment for crops in the greenhouse space.

[0043] Specifically, adjusting the ventilation and insulation conditions involves the greenhouse system utilizing ventilation parameters (used by ventilation unit 200 to indicate the flow state of the air exchange process) and insulation parameters (used by insulation unit 300 to adjust the temperature and temperature distribution) to establish ventilation and insulation conditions that apply to the greenhouse space. In response to signals indicating that first flag information collected from the greenhouse space does not match preset flag information and / or in response to signals indicating that second flag information collected from the external space meets a change threshold, the greenhouse system updates and adjusts the ventilation and insulation conditions by changing the ventilation and insulation parameters. Therefore, the greenhouse system can intelligently adjust ventilation and insulation conditions by comprehensively considering various factors affecting the crop growth environment, both in the greenhouse space and in the external space.

[0044] In the present application, the ventilation parameters used to indicate the flow state of the air exchange process include at least: ventilation flow rate and ventilation path. The ventilation flow rate refers to the air flow rate introduced by the ventilation unit 200 through a passive structure or introduced into the greenhouse space through active equipment. The ventilation path refers to the flow path formed in the greenhouse space by the ventilation unit 200 by changing the direction of air flow, so that the ventilation unit 200 can assist in air renewal and heat transfer in the greenhouse space through the ventilation flow rate and ventilation path. The insulation parameters used to adjust the temperature and temperature distribution include at least: introduction temperature and exhaust temperature. The introduction temperature refers to the temperature of the air passing through the ventilation unit 200 and acting on the greenhouse space. The exhaust temperature refers to the temperature of the air when it is discharged from the greenhouse space.

[0045] The first flag information collected in the greenhouse space may include the air composition information and internal temperature of the greenhouse space. The air composition information mainly monitors the oxygen concentration and carbon dioxide concentration information in the greenhouse space to ensure that the oxygen and carbon dioxide in the greenhouse space are at a reasonable concentration level; the internal temperature mainly considers the average temperature of the crop area and the temperature distribution collected by several monitoring points. The preset flag information is set with a reference standard corresponding to the first flag information. The reference standard can be expressed in the form of a numerical range, so that the first flag information should be within the numerical range used as the reference standard. When the first flag information exceeds the numerical range set by the preset flag information, the ventilation and insulation conditions need to be adjusted. In addition, the preset flag information changes with the change of day and night and the change of crop growth stage, so that the numerical range of the preset flag information is the environmental parameter range suitable for the current crop growth.

[0046] Secondary information collected from the external space can include sunshine information, weather information, and external temperature. Sunlight information primarily considers sunshine angle and intensity. Sunlight angle varies over time, creating different illumination angles for the greenhouse space. Combined with variations in sunshine intensity and weather interference, the heat introduced into the greenhouse space by sunlight exhibits significant temporal and spatial nonuniformity. Weather information primarily considers the dust concentration and wind speed of the air surrounding the greenhouse system. This information can be used to indicate the severity of the external space's erosive effects on the greenhouse system, necessitating temporary isolation of the greenhouse and external space to protect against extreme weather conditions such as sandstorms. External temperature primarily reflects the temperature of the external space surrounding the greenhouse system. A threshold condition is a condition that alters the ventilation and insulation settings of the greenhouse system based on the magnitude of changes in external environmental factors. For example, a threshold condition is set based on changes in sunshine angle within the sunshine information. When the sunshine angle changes by a certain amount, the current ventilation and insulation settings become less applicable, potentially causing local temperature imbalances and damaging crops. Therefore, ventilation and insulation settings need to be adjusted to accommodate the changes in heat distribution caused by the change in sunshine angle.

[0047] In order to achieve intelligent adjustment of ventilation and insulation conditions, the greenhouse system of the present application is also provided with a control center 400 for regulating the ventilation and heat exchange process. The control center 400 is respectively connected to the internal monitoring unit 402 and the external monitoring unit 401 for data. The internal monitoring unit 402 is used to collect the first sign information of the greenhouse space, and the external monitoring unit 401 is used to collect the second sign information of the external space.

[0048] Specifically, for the air composition information in the first indicator information, the internal monitoring unit 402 is equipped with an air analyzer or air monitoring sensor, which is primarily used to monitor changes in oxygen and carbon dioxide concentrations within the greenhouse space. Several air analyzers or air monitoring sensors can be arranged at different locations within the greenhouse space, so that the collected air composition information can be used to obtain air distribution differences and obtain more accurate air composition information based on average data. For the internal temperature information in the first indicator information, the internal monitoring unit 402 is equipped with several temperature sensors within the greenhouse space, so that these temperature sensors can collect the temperature distribution within the greenhouse space to understand the uneven heat distribution characteristics within the greenhouse space. For the sunlight information in the second indicator information, the external monitoring unit 401 is equipped with a light sensor, which can be used to obtain sunlight angle, sunlight intensity, and its variation range. The light sensor can also be integrated into a weather monitor, allowing the weather monitor to obtain sunlight information and combine sunlight information, wind direction, wind intensity, and air sand content to obtain weather information. The external temperature can also be obtained through a temperature sensor installed in the weather monitor.

[0049] In addition, the control center 400 is also connected to an interaction unit 403, which is used to display status information of the greenhouse space and the external space. The status information includes first flag information, second flag information, and corresponding parameter settings of the ventilation unit 200 and the insulation unit 300. This allows personnel to obtain status information of the greenhouse space and the external space based on the interaction unit 403 and perform manual adjustments through the interaction unit 403. For example, the interaction unit 403 can be a display control instrument arranged in the greenhouse system control center 400 or a terminal device remotely connected to the control center 400.

[0050] Preferably, the first flag information collected in the greenhouse space is used to indicate the growth environment of the crops in the greenhouse space. The greenhouse system is provided with preset flag information suitable for crop growth and serving as a reference standard for the first flag information, based at least on empirical crop growth data, so that the preset flag information is set to a numerical range that changes with diurnal changes and crop growth stages. Furthermore, in the event that the first flag information collected in the greenhouse space exceeds the numerical range of the corresponding preset flag information, the greenhouse system controls the first flag information to return to the numerical range of the corresponding preset flag information by adjusting the ventilation and insulation conditions by changing ventilation parameters and insulation parameters. The comparison result between the first flag information and the corresponding preset flag information is used to indicate the deviation of the actual state in the greenhouse space from the set state. Through the above-mentioned control and adjustment process, it is ensured that the greenhouse space can provide crops with ventilation and insulation conditions that change according to the set state and are allowed to fluctuate within a certain range, thereby ensuring that the ventilation and insulation conditions have a positive supporting effect on crop growth.

[0051] For example, when the crops in the greenhouse space are tomatoes in the growth stage, the preset flag information for the first flag information includes: the numerical range of the carbon dioxide concentration in the air composition information is set to 0.06% to 0.12%, and the numerical range of the internal temperature is set to 20 to 28 degrees during the day and 15 to 20 degrees at night. When the carbon dioxide concentration value collected by the internal monitoring unit 402 is higher than the upper limit of its vertical range, the promoting effect of carbon dioxide on plant activity is significantly reduced. For example, at night, when crops respire and cause carbon dioxide to accumulate, the current ventilation and insulation conditions cannot ensure that the carbon dioxide concentration is within a reasonable range. It is necessary to adjust the ventilation and insulation conditions to promote the carbon dioxide concentration to return to the numerical range set by the preset flag information. Specifically, in response to a signal indicating that the carbon dioxide concentration in the first flag information obtained by internal monitoring unit 402 exceeds the upper limit of the numerical range set by the corresponding preset flag information, control center 400 determines the ventilation flow adjustment amount of ventilation unit 200 based on the calculation result, and controls first regulating component 202 to increase the opening of vent 201 and the power of the active device to increase the flow cross-sectional area and flow velocity, so that the increase in ventilation flow can restore the carbon dioxide concentration in the first flag information to the numerical range set by the preset flag information. In addition, control center 400 controls second regulating component 203 to periodically change the air flow direction, so that ventilation unit 200 achieves air sweeping while increasing the ventilation flow, so that the air introduced from the external space can be evenly applied to the greenhouse space, avoiding the occurrence of control blind spots within the greenhouse space.

[0052] Taking into account that the temperature of the air introduced from the external space is different from the air temperature in the greenhouse space, the above-mentioned ventilation flow adjustment process will inevitably cause the internal temperature in the first flag information to change. When the internal temperature is still within the numerical range set by the corresponding preset flag information, the insulation unit 300 can maintain the current insulation parameters without making any changes; when the internal temperature exceeds the upper limit of the numerical range set by the corresponding preset flag information due to the increase in the amount of air introduced, the insulation unit 300 needs to change the heat exchange amount with the air through the third adjustment component 302, for example, increase the heat exchange area of ​​the third adjustment component 302 and reduce the heat exchange temperature of the third adjustment component 302, so that the introduction temperature of the air entering the greenhouse space is reduced to promote the temperature in the greenhouse space to return to the set numerical range.

[0053] Preferably, the second flag information collected from the external space is used to indicate the external environment in which the greenhouse system is located. The greenhouse system sets a change threshold condition for intervention based on the second flag information at least according to historical environmental data, so that the greenhouse system adjusts the ventilation and insulation conditions when the second flag information reaches the corresponding change threshold condition. Furthermore, the greenhouse system adjusts the ventilation and insulation conditions when the second flag information collected from the external space reaches the corresponding change threshold condition, including: when the change in sunlight angle reaches the change range set by the corresponding change threshold condition, the greenhouse system adjusts the ventilation parameters and insulation parameters to transfer the heat transferred to the greenhouse system by the sun in a non-uniform manner. The comparison result of the second flag information and the corresponding change threshold condition is used to indicate the degree of influence of the environmental parameters of the external space on the greenhouse space, that is, when the second flag information reaches the change range set by the corresponding change threshold condition, the influence of the environmental factors of the external space on the greenhouse space changes significantly, and the greenhouse space needs to adapt to the above changes by adjusting the ventilation and insulation conditions and ensure that the ventilation and insulation conditions operate within an economical and efficient range.

[0054] For example, the threshold conditions for changes in the sunlight information in the second flag information include: the sunlight intensity reaches a first set value and the sunlight angle changes by a second set value. For example, the first set value is set to a certain percentage of the local average sunlight intensity, such as 30%, to represent the sunlight intensity received by the greenhouse system. When the sunlight intensity is lower than the first set value, the weather is cloudy or rainy, so changes in the sunlight angle do not significantly change the light intensity received by the greenhouse system, or when there is no sunlight at night. The second set value is set to a variable angle value, such as 30 degrees, and the variable angle value is negatively correlated with the sunlight intensity. For example, if the ratio of sunlight intensity to the local average sunlight intensity increases by 10 percentage points, the variable angle value decreases by 1 degree. That is, as the sunlight intensity increases, the change in the unit sunlight angle has a more significant impact on the heat distribution received by the greenhouse system. Adjusting the variable angle value can improve the greenhouse system's ability to track changes in sunlight information, ensuring the adaptability of the greenhouse system's ventilation and insulation operating conditions, so that the heat removed from the greenhouse space matches the heat received based on the current ventilation and insulation operating conditions.

[0055] Changes in the sunlight angle cause changes in the heat distribution acting on the greenhouse system, resulting in localized overheating and normal temperatures in other locations within the greenhouse system. In response to signals indicating that the sunlight intensity reaches a first set value and the sunlight angle changes by a second set value, the control center 400 adjusts the ventilation path of the ventilation unit 200 based on the change in sunlight angle and adjusts the ventilation flow rate based on the change in sunlight intensity. Ventilation unit 200 uses a second regulating component 203 to change the air flow direction and adjust the ventilation path, so that the ventilation path primarily affects locations with concentrated sunlight and locally overheated areas, thereby effectively alleviating the uneven heat distribution caused by changes in sunlight angle and intensity.

[0056] For example, the threshold conditions for weather information changes in the second flag information include: sunshine intensity changing by a third set value, wind intensity reaching a fourth set value and wind direction changing by a fifth set value, or external air dust density changing by a sixth set value. The third set value can be 10% of the local average sunshine intensity; the fourth set value can be wind speed level 1; the fifth set value can be 30 degrees; and the sixth set value can be 20% of the local annual average air dust density. For example, in response to a signal indicating that the sunshine intensity in the external space decreases by a third set value, the control center 400 reduces the ventilation flow rate through the ventilation unit 200 or increases the intake temperature through the insulation unit 300, thereby reducing the amount of heat removed from the greenhouse system and ensuring stable environmental parameters within the greenhouse space. In response to a signal indicating that the external air dust density increases by a sixth set value, the control center 400 reduces the ventilation flow rate through the ventilation unit 200 and lowers the intake temperature through the insulation unit 300. While maintaining the heat removed from the greenhouse system, the control center 400 reduces the amount of air introduced into the greenhouse space, thereby reducing the workload of air dust treatment and the amount of dust introduced into the greenhouse space.

[0057] It should be noted that the above-described specific embodiments are illustrative only. Those skilled in the art may devise various solutions based on the disclosure of the present invention, and such solutions fall within the scope of the present invention and are intended to be protected by the present invention. Those skilled in the art should understand that the present description and its accompanying drawings are intended to be illustrative only and are not intended to limit the scope of the claims. The scope of protection of the present invention is defined by the claims and their equivalents.

Claims

1. A desert greenhouse control method, characterized in that: The control method comprises: Constructing a greenhouse space for growing crops and isolating the greenhouse space from the outside space by at least a building frame structure; Performing air exchange between the greenhouse space and the external space and adjusting the temperature and temperature distribution in the greenhouse space; Composing ventilation and thermal insulation conditions acting on the greenhouse space according to ventilation parameters for indicating the flow state of the air exchange process and thermal insulation parameters for adjusting the temperature and temperature distribution; In response to a signal that a number of first sign information collected from the greenhouse space does not match the preset sign information and / or in response to a signal that a number of second sign information collected from the external space reaches a change threshold condition, the ventilation parameters and the insulation parameters are changed to update and adjust the ventilation and insulation working conditions.

2. The control method according to claim 1, characterized in that: collecting the first marking information of the greenhouse space for indicating the growth environment of crops in the greenhouse space; At least according to the crop growth experience data, preset mark information suitable for crop growth and serving as a reference standard for the first mark information is set, wherein the preset mark information is set to a numerical range that changes with day and night changes and crop growth stage changes.

3. The control method according to claim 1 or 2, characterized in that: When the first flag information collected in the greenhouse space exceeds the numerical range of the corresponding preset flag information, the first flag information is controlled to be restored to the numerical range of the corresponding preset flag information by changing the ventilation parameters and the insulation parameters to adjust the ventilation and insulation working conditions.

4. The control method according to any one of the preceding claims 1 to 3, characterized in that: Collect the second mark information of the external space for indicating the external environment of the greenhouse system, set the change threshold condition for intervention based on the second mark information at least according to the historical environmental data, and adjust the ventilation and insulation conditions when the second mark information reaches the corresponding change threshold condition.

5. The control method according to any one of the preceding claims 1 to 4, characterized in that: When the second flag information collected from the external space reaches a corresponding change threshold condition, adjusting the ventilation and heat preservation working condition includes: When the change in sunlight angle reaches the change range set by the corresponding change threshold condition, adjust the The ventilation parameters and the insulation parameters are used to transfer the heat transferred to the greenhouse system by the sun in a non-uniform manner.

6. The control method according to any one of the preceding claims 1 to 5, characterized in that: Changing the ventilation parameters is performed at least in the following manner: adjusting the ventilation flow rate of air from the external space into the greenhouse space and adjusting the ventilation path of air flowing in the greenhouse space by controlling the flow direction of air entering the greenhouse space, The ventilation flow rate of air entering the greenhouse space from the external space is adjusted by changing the size of the circulation cross-sectional area and / or the size of the circulation velocity.

7. The control method according to any one of the preceding claims 1 to 6, characterized in that: Changing the insulation parameters is performed at least in the following manner: The ventilation flow rate of the ventilation parameters is coordinated to adjust the introduction temperature of the air into the greenhouse space, and the ventilation path of the ventilation parameters is coordinated to adjust the temperature distribution in the greenhouse space. The adjustment of the introduction temperature of the air into the greenhouse space is implemented by exchanging heat with the air entering the greenhouse space.

8. A desert greenhouse system, characterized in that: The greenhouse system comprises: A main unit (100) is used to construct a greenhouse space for growing crops, wherein the main unit (100) is used to isolate the greenhouse space from an external space at least by means of a building frame structure; a ventilation unit (200) for exchanging air between the greenhouse space and the outside space; A heat preservation unit (300) for adjusting the temperature and temperature distribution in the greenhouse space; A control center (400) is used to control the ventilation unit (200) and the heat preservation unit (300) to perform ventilation and heat preservation regulation on the greenhouse system. in, The greenhouse system at least relies on the ventilation parameters of the ventilation unit (200) for indicating the flow state of the air exchange process and the insulation parameters of the insulation unit (300) for adjusting the temperature and temperature distribution to form ventilation and insulation working conditions acting on the greenhouse space; In response to a signal that a plurality of first sign information collected from the greenhouse space does not match the preset sign information and / or in response to a signal that a plurality of second sign information collected from the external space reaches a change threshold condition, the control center (400) updates and adjusts the ventilation and insulation working conditions by changing the ventilation parameters and the insulation parameters.

9. The greenhouse system according to claim 8, characterized in that The ventilation unit (200) is provided with a plurality of ventilation openings (201) connecting the greenhouse space and the external space. The ventilation unit (200) is provided with a first regulating component (202) for adjusting the ventilation flow rate and a second regulating component (203) for adjusting the ventilation path on a side of the ventilation opening (201) close to the greenhouse space.

10. The greenhouse system according to claim 8 or 9, characterized in that: The heat preservation unit (300) is provided with a third regulating component (302) at a position close to the ventilation opening (201) for performing heat exchange with the air entering the greenhouse space. The heat exchange between the third regulating component (302) and the air is implemented by changing the heat exchange temperature and / or heat exchange area between the third regulating component (302) and the air.

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