Desert greenhouse framework system and control method therefor

Abstract

The present invention relates to a desert greenhouse framework system and a control method therefor. The desert greenhouse framework system comprises: a greenhouse framework comprising an overground framework and an underground framework which are detachably assembled; a plurality of freezers operably attached to the underground framework, configured in a plurality of groups in annular arrays, and at least partially placed in a sand layer; and a controller communicatively coupled to the freezers and configured to, on the basis of the temperature of the sand layer and the distribution positions of the freezers, dynamically adjust freezing parameters of the freezers, so as to change the morphology of the sand layer corresponding to each freezer. By dynamically regulating the cooling efficiency of the freezers according to the temperature change of the sand layer outside the greenhouse, the present invention ensures the stability of the solid-state sand layer serving as a greenhouse foundation part and, according to the distribution positions of the freezers, differentially controls the cooling efficiency thereof, thus saving electric power resources in deserts while reinforcing sand layer structures.

Description

A desert greenhouse skeleton system and control method thereof Technical Field

[0001] The present invention relates to the technical field of greenhouses, and in particular to a desert greenhouse skeleton system and a control method thereof. Background Art

[0002] Deserts are areas with extremely low precipitation, high evaporation, low soil moisture, and minimal vegetation cover. Deserts currently cover approximately 20% of the world's land area. However, due to rapid evaporation, large diurnal temperature swings, and strong wind and sand erosion, deserts are not suitable for human habitation, crop cultivation, or animal husbandry. Consequently, approximately one-fifth of the world's land area remains unused. To address this issue, those skilled in the art have proposed a technical solution for constructing greenhouses in deserts.

[0003] CN215683710U discloses a desert planting ecological greenhouse, which includes a windward wall, a sand guide plate, a keel, and a front wall; the sand guide plate is fixed to the front side of the top of the windward wall by bolts; the top of the front end of the windward wall is embedded and connected to the rear end of the keel, and the top of the front end of the windward wall is connected to the rear end of the keel by bolts; the bottom of the front end of the windward wall is embedded in the top of the front wall, and the bottom of the front end of the windward wall is connected to the top of the front wall by bolts; the keel includes longitudinal bones and transverse bones; multiple longitudinal bones and transverse bones are provided, and the multiple longitudinal bones and multiple transverse bones are arranged in a grid shape.

[0004] Since the adhesion between sand in the desert is not strong, greenhouses built in the desert often have problems with foundation settlement and foundation tilting. Therefore, those skilled in the art have proposed desert temperature greenhouses that can prevent subsidence. For example, CN212035109U discloses an anti-subsidence desert planting greenhouse, which includes several fixed frames, which are fixedly connected by pins. A support base is fixed inside the fixed frame, and a planting frame and a fixed seat are fixed on the top of the support base; a lifting rod is fixed on the fixed seat, and a support beam is fixed on the top of the lifting rod; a permeable planting trough is clamped on the top end face of the planting frame; the supporting base includes a bottom plate that cooperates with the fixed frame, and the top end face of the bottom plate is fixed to the support plate through a fixing plate; a connecting hole is provided at the bottom of the inner wall of the fixed frame, and pin holes are provided on the side surface of the fixed frame.

[0005] However, even if the existing method of increasing the contact area between the foundation and the desert surface is used to build greenhouses, due to the windy and high-wind environment in the desert and the differences in the stability of the sand layers in different sand areas, some sand in contact with the foundation surface will still shift under the action of wind for a long time. In addition, the temperature in the desert is extremely high during the day and night, and the huge difference in moisture content in the sand area between morning and evening causes the greenhouse structure to become unstable and collapse, especially when the temperature rises during the day and moisture continues to evaporate, causing the low-water content part of the greenhouse in contact with the foundation surface to become soft and easily loosened. As a result, it moves from under the foundation to other locations under the action of wind, destroying the structural stability of the greenhouse foundation and the surrounding environment, leading to problems such as foundation settlement and structural tilt in the greenhouse, which ultimately affects crop growth.

[0006] In addition, on the one hand, there are differences in understanding among those skilled in the art; on the other hand, the applicant 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 technology.

[0007] Summary of the Invention

[0008] In view of the deficiencies of the prior art, the present invention provides a desert greenhouse skeleton system and a control method thereof, aiming to solve at least one or more technical problems existing in the prior art.

[0009] To achieve the above objectives, the present invention provides a desert greenhouse framework system and a control method thereof, comprising:

[0010] A greenhouse frame, comprising a detachably assembled above-ground frame and an underground frame;

[0011] a plurality of freezers operably attached to the underground framework and at least partially embedded in the sand layer, wherein the plurality of freezers are arranged in a plurality of groups in a circular array;

[0012] A controller is communicatively coupled to the freezing device and configured to dynamically adjust freezing parameters of the freezer based on the temperature of the sand layer and / or the distribution position of the freezer in the annular array.

[0013] In the present invention, the freezer is in the form of a freezing column. The plurality of freezing columns are divided into a plurality of groups in a ring array, which means that the lines connecting the plurality of freezing columns in each group in a plane form a ring structure, and the plurality of freezing columns are arranged in a circle in a plane in a manner similar to concentric circles. When the freezing columns are attached to the underground skeleton and inserted into the sand layer, the freezing columns can serve as a foundation support structure to cooperate with the spiral columns to reinforce the greenhouse skeleton. In addition, based on the temperature difference between the inside and outside of the greenhouse, the freezing columns use the sand layer and an external water source to freeze the corresponding sand layer, so that in desert areas with a large temperature difference between day and night, the sand layer serving as the foundation can be condensed into a solid structure, thereby enabling the sand layer serving as the foundation to be reinforced again to prevent the collapse of the greenhouse skeleton structure. In addition, the present invention can utilize a semiconductor freezer with natural water circulation heat dissipation. The semiconductor freezer cools when it is powered on, can directly and quickly freeze the sand layer, and reduces the consumption of water resources in the desert environment. There is no risk of salt water leakage and contamination of the sand layer environment.

[0014] Preferably, the controller is configured to dynamically adjust the freezing parameters of one or more freezers in each annular array in time based on the change in sand layer temperature caused by the change in sunlight trajectory.

[0015] Preferably, the cooling power of the freezers corresponding to the sun-facing side of the greenhouse frame, which is temporally correlated with the sunlight trajectory, is greater than the cooling power of the freezers corresponding to the shaded side. In desert regions, due to the large diurnal temperature difference, the present invention dynamically adjusts the cooling power of the freezer columns based on the temperature changes in the sand layer, increasing the overall cooling power during high-temperature, sunny periods and reducing it at night or during low temperatures. Furthermore, the present invention dynamically adjusts the cooling intensity of the freezer columns on both the sun-facing and shaded sides of the greenhouse in a manner correlated with the changing sunlight trajectory, thereby conserving desert water and electricity resources while ensuring the overall structural strength of the sand layer, which serves as the foundation. Furthermore, because the cooling power on the sun-facing side of the greenhouse frame, which is temporally correlated with the sunlight trajectory, is higher, the corresponding sand layer temperature is lower. Due to the heat transfer temperature difference, more hot air will converge and condense there compared to the shaded side of the greenhouse frame, allowing the freezer columns to use this condensed water to reinforce the corresponding sand layer. Furthermore, the subsequent melting of the continuous frozen mass formed to reinforce the greenhouse can be used as water for crop cultivation within the greenhouse.

[0016] Preferably, the controller dynamically adjusts the freezing parameters of the freezers based on their distribution within the annular array, including controlling the cooling power of the multiple freezers to vary along the annular array arrangement. Due to temperature differences between the interior and exterior of the desert greenhouse, different sand layers experience varying degrees of temperature fluctuation and moisture loss. Therefore, varying cooling intensities are provided in different annular arrays based on the corresponding temperature variations in the sand regions, thereby ensuring that condensation patterns are maintained in sand regions experiencing significant temperature fluctuations and moisture loss, while also minimizing power consumption.

[0017] Preferably, the cooling power of one or more freezers in the outer annular array is lower than the cooling power of one or more freezers in the inner annular array. Because the temperature difference between day and night in the sand layer inside the greenhouse is small and the humidity is relatively high and easy to maintain compared to the outer sand layer, increasing the cooling power of the freezing columns inside the greenhouse is beneficial for improving and maintaining the stability of the entire greenhouse skeleton foundation structure. It can also reduce the overall consumption of hydropower in desert environments, especially reducing the energy consumption caused by the significant increase in the cooling power of the freezing columns due to the continuous temperature fluctuations in the outer sand layer.

[0018] Preferably, the desert greenhouse skeleton system provided by the present invention also includes operable humidification pipes, with multiple humidification pipes interlaced and connected to the underground skeleton. Moisture is injected into the sand layer at the foundation connection through the humidification pipes, so that the freezing columns use the water in the sand layer to cool and condense the corresponding sand layer, thereby solidifying the sand layer serving as the foundation into a solid structure and enhancing the structural stability of the sand foundation.

[0019] Preferably, the freezer provided by the present invention may include a hot end protective sleeve; a cold end protective sleeve arranged radially outside the hot end protective sleeve; and a plurality of semiconductor refrigeration sheets arranged axially and circumferentially between the hot end protective sleeve and the cold end protective sleeve.

[0020] Preferably, a plurality of semiconductor refrigeration sheets can be connected to each other through a flexible circuit to form a plurality of annular arrays along the axial direction of the hot end protection sleeve and / or the cold end protection sleeve.

[0021] Preferably, the present invention also relates to a desert greenhouse framework control method, which may include the following steps:

[0022] Arrange the plurality of freezers into a plurality of groups in a ring array manner, and attach each group of freezers to an underground frame of a greenhouse frame;

[0023] Acquire sand layer temperature data related to the greenhouse framework in a manner correlated with the distribution locations of the freezers;

[0024] The freezing parameters of the freezers are dynamically adjusted based on the sand layer temperature data and / or the distribution positions of the freezers in the annular array.

[0025] Preferably, the step of dynamically adjusting the freezing parameters of the freezer based on the sand layer temperature data and / or the distribution positions of the freezer in the annular array may include:

[0026] Dynamically adjusting the freezing parameters of one or more freezers in each annular array in time based on the change in sand layer temperature caused by the change in sunlight trajectory; and / or

[0027] The multiple freezers have varying refrigeration powers in the arrangement direction of the annular array. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG1 is a schematic diagram of a partial structure of a greenhouse according to a preferred embodiment of the present invention;

[0029] FIG2 is a simplified structural diagram of a greenhouse framework according to a preferred embodiment of the present invention;

[0030] FIG3 is a schematic top view of a greenhouse frame according to a preferred embodiment of the present invention;

[0031] FIG4 is a schematic diagram of the bottom structure of an underground skeleton according to a preferred embodiment of the present invention;

[0032] FIG5 is a schematic top view of the structure of a freezer according to a preferred embodiment of the present invention.

[0033] Reference Signs List

[0034] 100: above-ground frame; 200: underground frame; 110: vertical frame; 120: arched frame; 210: outer frame matrix; 220: inner frame matrix; 230: freezer; 231: semiconductor refrigeration chip; 232: flexible circuit; 233: cold end protection cover; 234: hot end protection cover; 235: cold end heat conduction layer; 236: hot end heat conduction layer; 240: humidification pipeline; 250: first connecting rod; 260: second connecting rod; 211: base column. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0036] Example 1

[0037] The present invention provides a desert greenhouse skeleton system, which may include a greenhouse skeleton, a plurality of refrigeration devices operably mechanically coupled / attached to the greenhouse skeleton, and an industrial controller serving as a control core of the greenhouse skeleton system.

[0038] Specifically, the desert greenhouse skeleton system provided by the present invention may include:

[0039] The greenhouse frame includes a detachably assembled above-ground frame 100 and an underground frame 200;

[0040] A plurality of freezers 230 operably attached to the underground framework 200 and at least partially embedded in the sand layer, wherein the plurality of freezers 230 are arranged in a plurality of groups in a circular array;

[0041] The controller is communicatively coupled to the freezer 230 and configured to dynamically adjust freezing parameters of the freezer 230 based on the temperature of the sand layer and / or the distribution location of the freezer 230 .

[0042] In particular, Figures 1 to 4 illustrate schematic structural diagrams of a greenhouse framework according to a preferred embodiment. Specifically, as shown in Figure 1, the greenhouse framework, or greenhouse, is constructed using a pipe rack mechanism and comprises an underground framework 200 and an above-ground framework 100 disposed above the underground framework 200, which is used to construct the greenhouse's exterior facade and top surface. The underground framework 200 serves as the framework foundation and is laid on or within a sand layer. Furthermore, an insulation layer can be laid between the above-ground framework 100 and the underground framework 200, the surface of which can be used to fill with planting soil.

[0043] According to a preferred embodiment, referring to Figures 1 and 2, the underground skeleton 200 may include an outer skeleton base 210 and a plurality of inner skeleton bases 220. Specifically, as shown in Figures 2 to 4, the outer skeleton base 210 is basically a frame-type enclosing structure, which is formed by connecting and enclosing a plurality of strip columns. Further, as shown in Figures 1 and 2, a plurality of base columns 211 are arranged in the gap on one side of the outer skeleton base 210 facing or contacting the sand. Each base column 211 is inserted basically vertically into the sand layer, thereby stabilizing the outer skeleton base 210 as the basic frame. In particular, the base column 211 preferably adopts a spiral pile structure, that is, a continuous threaded structure can be formed on the outer peripheral surface of the column. The advantage of the spiral pile column is that it can be arranged relatively quickly on soft soil and can improve the settlement of the building on soft soil, and has good applicability for desert areas.

[0044] According to a preferred embodiment, in the present invention, some or all of the spiral pile-type base columns 211 can be connected together by connecting lines, that is, adjacent base columns 211 can be connected by connecting rods or connecting ropes to strengthen the stability of the base columns 211 relative to the outer base 210 of the skeleton, thereby reducing the possibility of significant settlement of the skeleton structure in the desert.

[0045] According to a preferred embodiment, referring to Figures 3 and 4, a plurality of internal skeleton bases 220 are arranged on the closed inner side of the external skeleton base 210. Specifically, the internal skeleton base 220 is the same as or similar to the external skeleton base 210 and is basically a frame-type enclosing structure, which is formed by connecting and enclosing a plurality of strip columns. Further, for example, when viewed from an upward angle as shown in Figure 4, the plurality of internal skeleton bases 220 are arranged at one side of each other in the radial direction, thereby forming a skeleton structure that is basically in the shape of a "U" on the inner side of the external skeleton base 210. In particular, the plurality of internal skeleton bases 220 can be arranged to surround each other at intervals that vary linearly or nonlinearly.

[0046] As a non-limiting example, in the present invention, the refrigeration device or freezer 230 attached to the underground skeleton 200 can utilize a freezing column based on semiconductor refrigeration technology, which utilizes the thermoelectric effect of semiconductor materials to achieve cooling. Specifically, direct current is passed through a galvanic couple formed by two semiconductor materials connected in series, causing the two ends of the galvanic couple to absorb and release heat, respectively, thereby achieving a cooling effect.

[0047] According to a preferred embodiment, a plurality of freezers 230 (i.e., freezing columns) are attached to each skeleton inner matrix 220 according to a preset arrangement rule, and are at least partially vertically placed in the sand layer. Specifically, referring to FIG4 , a plurality of freezing columns are respectively connected to the corresponding skeleton inner matrix 220 along the zigzag structural gap of each skeleton inner matrix 220, and are basically vertically inserted into the sand layer. In particular, the freezing columns are controlled to work so as to lower the temperature of the sand layer around them and condense the moisture in the sand, so that the sand layer serving as the foundation part is transformed from a sparsely dispersed soft state to a more compactly distributed reinforced state. Even if the sand around the sand layer of the solid structure is blown to other places by the wind, the solid sand layer serving as the foundation structure will not experience foundation settlement or tilting like ordinary sand layers after structural reinforcement, thereby improving the stability of the desert greenhouse and ensuring the service life of the desert greenhouse.

[0048] As a non-limiting example, FIG5 shows a special case of a freezer 230 based on semiconductor refrigeration technology according to the present invention. Referring to FIG5 , the freezer 230 (or freezing column) is constructed as a cylindrical structure. The freezer 230 may include an inner and outer shell, wherein the outer shell is designed as a cold end protective sleeve 233, and the inner shell is designed as a hot end protective sleeve 234. Furthermore, a plurality of semiconductor refrigeration fins 231 are arranged between the cold end protective sleeve 233 and the hot end protective sleeve 234, and are spaced apart along the axial and circumferential directions of the freezer 230. The side of the semiconductor refrigeration fin 231 facing the cold end protective sleeve 233 is the cold end. The side of the semiconductor refrigeration fin 231 facing the hot end protective sleeve 234 is the hot end. In particular, the semiconductor refrigeration fin 231 may be a PN semiconductor heterojunction composed of a P-type semiconductor and an N-type semiconductor.

[0049] According to a preferred embodiment, the cold end of semiconductor refrigeration chip 231 is adjacent to cold end protective sleeve 233. The hot end of semiconductor refrigerator 232 is adjacent to hot end protective sleeve 234. Furthermore, a cold end heat conductive layer 235 is provided between the cold end of semiconductor refrigeration chip 231 and cold end protective sleeve 233. This cold end heat conductive layer 235 allows heat from the outside of freezer 230 to be transferred from cold end protective sleeve 233 to the cold end of semiconductor refrigeration chip 231. The cold end heat conductive layer 235 can fill the gap between semiconductor refrigeration chip 231 and cold end protective sleeve 233, thereby improving the efficiency of heat transfer.

[0050] According to a preferred embodiment, a hot end heat conducting layer 236 is provided between the hot end of the semiconductor refrigeration plate 231 and the hot end protective sleeve 234. The hot end heat conducting layer 236 allows the heat generated by the hot end of the semiconductor refrigeration plate 231 to be quickly transferred to the hot end protective sleeve 234, and then the heat in the hot end protective sleeve 234 is taken away by the cooling medium (such as water) passed into the hot end protective sleeve 234 to complete the heat dissipation. Specifically, the pipeline for transporting the cooling medium may include an inner tube and an outer tube formed by the hot end protective sleeve 234. The cooling medium can enter through the inner tube and be discharged from the annular gap between the inner tube and the outer tube after reaching the other end. The hot end heat conducting layer 236 can fill the gap between the semiconductor refrigeration plate 231 and the hot end protective sleeve 234, thereby improving the efficiency of heat transfer.

[0051] According to a preferred embodiment, several semiconductor cooling sheets 231 arranged circumferentially and axially along freezer 230 are connected in series via flexible circuits 232 to form a roughly annular ring structure. Specifically, each freezer 230 can be arranged along its axis with multiple semiconductor cooling sheets 231 surrounding the ring structure, ensuring that the entire outer surface of the freezer 230 can cool the sand layer.

[0052] Preferably, the flexible circuit 232 can be made of a high-thermal-conductivity metal-based copper-clad laminate. Specifically, the high-thermal-conductivity metal-based copper-clad laminate of the flexible circuit 232 can be formed by hot-pressing soft copper, a flexible high-thermal-conductivity adhesive film, and rolled copper foil. This method allows the high-thermal-conductivity metal-based copper-clad laminate to have good flexibility and be easily curled.

[0053] In particular, the arrangement position and number of the semiconductor refrigeration chips can be changed according to needs. Optionally, the semiconductor refrigeration chips can adopt one or more of single-stage refrigeration, two-stage refrigeration and multi-stage refrigeration.

[0054] It should be understood that the use of freezer 230 based on semiconductor refrigeration principles is provided as a non-limiting preferred example and should not be construed as a specific limitation of the present invention. Alternatively, freezer 230 may employ a conventional freezer based on negative temperature refrigerant refrigeration. Specifically, negative temperature salt water circulating within the freezer absorbs heat from the sand layer, condensing the water-bearing sand layer surrounding freezer 230 from near to far, forming a continuous frozen mass.

[0055] According to a preferred embodiment, the power of the freezer 230 can come from a solar power station, a wind power station and / or a generator device. In particular, for desert areas far away from urban areas or oases, the problem of electricity supply for desert greenhouses is a very difficult problem, because supplying power to desert areas involves laying long-distance lines, and the extreme weather such as strong winds and sandstorms in desert areas poses huge challenges to the long-distance laying and operation and maintenance of desert power grids. In particular, wind and sand erosion and quicksand accumulation have a significant impact on the stability of tower base columns and the insulation performance of transmission lines, thereby threatening the stability and safety of power transmission. In addition, the special characteristics of the desert climate also lead to a significant increase in the loss of long-distance power transmission. Therefore, it is not easy to maintain a stable power supply to desert greenhouses by relying on long-distance power transmission.

[0056] In contrast, electricity generated by photovoltaic power stations built in the desert is the best choice for desert greenhouses. The reason is that the long-distance transmission of electricity generated by photovoltaic power stations still has many typical drawbacks. In particular, photovoltaic power stations are often built in remote desert areas far away from urban areas or oases. The long-distance transportation of their electricity to the power-consuming areas to supply residents still faces problems with power transmission stability and loss and waste. In particular, in winter, some areas rely on coal-fired power, which makes the photovoltaic electricity generation ineffective. For this reason, photovoltaic power is preferably used locally, that is, a combined photovoltaic power generation and greenhouse cultivation model. In addition to increasing the utilization rate of renewable energy in desert areas, photovoltaic power stations also help to control sand and improve desert ecology. At the same time, they also have the auxiliary function of sand fixation, thereby maintaining the structural stability of the desert greenhouse framework.

[0057] In the present invention, in order to maintain the structural stability of the greenhouse skeleton in the sandy area, especially in the quicksand zone or the water-bearing sand layer, a freezer 230 is used to reinforce the strength of the sand layer foundation. The use of the freezer 230 involves more energy consumption in addition to the daily electricity consumption of the greenhouse. Therefore, it is more economical and environmentally friendly to use the electricity produced by the desert photovoltaic power station to maintain the intermittent or continuous high output of the freezer 230. Because one of the most abundant renewable energy sources in the desert is solar energy, the use of photovoltaic power to maintain the output of the freezer 230 to stabilize the desert greenhouse solves the limitation of long-distance power supply to the desert greenhouse, and the use of photovoltaic power not only improves the recyclability of natural resources, but also provides a stable source of electricity for the continuous cooling of the freezer 230, while also avoiding the electricity produced by the photovoltaic power station from being efficiently utilized. In addition, the electricity produced by the photovoltaic power station itself can also be used as a source of electricity for equipment / devices related to crop cultivation in the desert greenhouse, such as lighting, sprinkler irrigation and / or temperature regulation, thereby meeting the environment required for the growth and survival of crops in the desert environment.

[0058] According to a preferred embodiment, freezer 230 can be communicatively coupled to the controller of the greenhouse framework system. Furthermore, when using a semiconductor refrigeration freezing column, each or several semiconductor refrigeration chips in the freezing column can be controlled or driven by independent sub-controllers, thereby achieving zoned freezing or adjusting the freezing intensity. In particular, the controller can adjust the output power of the semiconductor refrigeration chips by adjusting the duty cycle of the output signal, thereby adjusting the cooling intensity. Furthermore, the freezing column can reverse the current to switch the heat absorption and heat release ends of the semiconductor refrigeration chips, thereby thawing the frozen sand layer.

[0059] According to a preferred embodiment, the desert greenhouse skeleton system provided by the present invention also includes a temperature acquisition unit, which may include a plurality of temperature sensors. Specifically, the temperature acquisition unit may include a plurality of first temperature sensors connected to each freezer 230 in a manner corresponding to at least one freezer 230, and the plurality of first temperature sensors may be used to collect the temperature of the sand layer corresponding to each freezer 230. Furthermore, the temperature acquisition unit may also include one or more second temperature sensors arranged on the periphery of the greenhouse, and the second temperature sensor is used to collect the external ambient temperature of the greenhouse. In addition, each temperature sensor is communicatively coupled to the system controller to allow the controller to determine the indoor and outdoor temperature difference based on the temperature data respectively obtained by the internal temperature sensor and the external temperature sensor of the greenhouse, thereby starting the freezer 230 and controlling its freezing parameters, such as the freezing mode and the corresponding cooling power, cooling cycle, etc.

[0060] According to a preferred embodiment, referring to Figure 3 , the external matrix 210 and the internal matrix 220 are further connected by a plurality of first connecting rods 250 arranged along their lengths and second connecting rods 260 arranged along their widths. For example, viewed from a top perspective as shown in Figure 3 , the plurality of first connecting rods 250 and second connecting rods 260 are arranged on the external matrix 210 and the internal matrix 220 in a staggered manner.

[0061] According to a preferred embodiment, as shown in FIG3 , a humidifying pipe 240 may be arranged on the first connecting rod 250 and the second connecting rod 260. The humidifying pipe 240 has a hole that allows liquid to flow out to penetrate into the sand layer. Specifically, a plurality of humidifying pipes 240 are attached to the corresponding first connecting rod 250 and the second connecting rod 260 along the length direction and the width direction, respectively. Alternatively, the first connecting rod 250 and the second connecting rod 260 may have a groove (not shown in the figure) for accommodating the humidifying pipe 240 for fixing the humidifying pipe 240. In particular, by passing water through the humidifying pipe 240, the ambient temperature of the crops planted on the surface of the sand layer can be adjusted to provide a suitable growth environment for the crops, and the moisture provided by the humidifying pipe 240 can enter the sand layer, thereby allowing the freezer 230 to use this moisture to condense the sand layer.

[0062] Alternatively, the humidification pipeline 240 may include an immersion pipe placed basically vertically in the sand layer, allowing the humidification pipeline 240 to inject moisture into the sand layer through the immersion pipe, so that the sand layer and the moisture immersed therein (including the sand layer's own moisture and externally added moisture) can be condensed by using the freezer 230 to condense the sand layer serving as the foundation into a solid structure, thereby preventing the greenhouse skeleton structure from settling, collapsing or tilting.

[0063] According to a preferred embodiment, the freezing parameters of freezer 230 are adjusted in association with the sand layer temperature and / or the distribution of freezer 230. Specifically, as daylight hours continue during the day, the temperature difference between the inside and outside of the greenhouse increases. The overall temperature change of the greenhouse, or the change in the temperature difference between the inside and outside, is temporally correlated with the daylight trajectory.

[0064] According to a preferred embodiment, as the sun's trajectory changes, the sun-facing side of the greenhouse, which is directly exposed to sunlight at the same time / period, experiences a rapid temperature rise, with greater temperature fluctuations compared to the shady side. Therefore, the sand layer on the sun-facing side of the greenhouse loses moisture faster, easily forming a larger temperature difference between the inside and outside. In particular, to maintain the structural stability of the greenhouse, in addition to employing a reinforced structure of qualified strength (such as screw-pile foundation columns 211), it is also necessary to maintain the temperature of the sand layer within an appropriate range to prevent the high temperature environment from accelerating moisture loss in the sand and forcing the sand layer to become further soft and prone to collapse. In view of this, when the temperature sensor collects temperature field information about the periphery and interior of the greenhouse, the controller can adjust the freezing parameters of the freezer 230, such as the cooling power and / or freezing time, based on the temperature information related to the greenhouse. Alternatively, the controller can dynamically adjust the freezing parameters of the freezer 230, such as the cooling power and / or freezing time, based on the changes in the sand layer temperature caused by the changes in the sunlight trajectory.

[0065] Specifically, during the daylight hours, the sunlight trajectory changes with the movement of the sun. In response to sand layer temperature information or atmospheric temperature information collected by the temperature sensor, when the temperature of the sand layer outside the greenhouse exceeds a suitable temperature threshold range, the controller can activate at least one or more freezers 230 in a circular array outside the greenhouse and maintain the output of these freezers 230 for a predetermined period of time to freeze and retain a portion of the sand layer outside the greenhouse, thereby strengthening at least the outer sand layer of the greenhouse. Alternatively, when the temperature of the sand layer inside the greenhouse exceeds a suitable temperature threshold range, the controller can activate at least one or more freezers 230 in a circular array inside the greenhouse and maintain the output of these freezers 230 for a predetermined period of time to freeze a portion of the sand layer inside the greenhouse through the internal freezers 230, thereby strengthening at least the inner sand layer of the greenhouse. Furthermore, while the freezers 230 are activated, their cooling power is dynamically adjusted by the controller based on the sand layer temperature information or atmospheric temperature information, such as increasing their cooling power in response to rising ambient temperature or a widening temperature difference between indoor and outdoor temperatures.

[0066] In particular, due to the influence of light blocking in the greenhouse, the temperature fluctuation of the underground sand layer inside the greenhouse is usually relatively small. However, in extremely hot weather, the high heat of the surrounding sand layer and the high temperature inside the greenhouse will still cause the temperature of the internal sand layer to rise. In particular, the sand with a small specific heat capacity will have a significant temperature increase after absorbing only a small amount of heat. Therefore, it is still necessary to maintain the stability of the temperature of the internal sand layer. Therefore, when at least multiple freezers 230 closer to the periphery are activated based on the temperature of the external sand layer, multiple freezers 230 in at least one inner ring array can be activated according to the temperature of the internal sand layer.

[0067] Furthermore, since desert greenhouses are often located near water-bearing areas, freezer 230 can utilize some of the sand's own groundwater when cooling and consolidating the sand layer. However, due to its limited content, the sand's condensation strength is limited. Therefore, humidification pipes 240 embedded in the underground framework 200 can simultaneously provide supplemental water to the underground sand layer, increasing its water content and enhancing its condensation strength. Specifically, the controller can adjust the output power of the semiconductor cooling chip by adjusting the current (or PWM signal duty cycle) output to freezer 230. Specifically, the cooling power of freezer 230 can be adjusted based on at least the external sand temperature. More specifically, the cooling power of freezer 230 can increase with increasing external sand temperature. For example, the cooling power of freezer 230 at 50°C is bkW, while the cooling power of freezer 230 at 70°C is akw, where a > b.

[0068] According to a preferred embodiment, due to the changing trajectory of the sun's movement, the sunny side and the shady side of a greenhouse typically exhibit different temperature characteristics. In particular, the sunny side of the greenhouse experiences more pronounced temperature fluctuations due to direct sunlight. Therefore, in the present invention, the cooling capacity of the freezer 230 is set in association with the sunlight's trajectory. Specifically, based on the temperature difference between the sunny and shady sides of the greenhouse, at least a portion of the freezer 230 on the sunny side of the greenhouse can have different cooling capacities than at least a portion of the freezer 230 on the shady side.

[0069] According to a preferred embodiment, the cooling power of at least some of the freezers 230 on the sunny side of the greenhouse can be greater than the cooling power of at least some of the freezers 230 on the shady side. Thus, the cooling power is increased on the side experiencing significant temperature fluctuations, particularly where water loss is more severe, to condense the sand layer on that side, thereby strengthening the sand foundation. Correspondingly, the output of the freezers 230 on the shady side is reduced. This ensures the overall stability of the sand foundation based on temperature fluctuations, while also saving unnecessary energy consumption in deserts, where hydropower resources are extremely precious. This improves the sustainability of desert greenhouses and allows more energy to be used for crop growth rather than strengthening the sand foundation.

[0070] In addition, the cooling power of the corresponding freezers 230 of the sun-facing side and the shade-facing side of the greenhouse varies with the daylight trajectory. That is, the sun-facing side and the shade-facing side of the greenhouse vary with the daylight trajectory over time. Therefore, the corresponding freezers 230 of the sun-facing side and the shade-facing side of the greenhouse also vary relatively. Therefore, the cooling power corresponding to the freezers 230 in different areas should be adjusted according to the temperature changes caused by the changes in sunlight. In particular, the specific number of freezers 230 corresponding to the sun-facing side and the shade-facing side of the greenhouse can be self-edited / set by the management personnel. Alternatively, the specific number of freezers 230 corresponding to the sun-facing side and the shade-facing side of the greenhouse can be derived from machine learning, preset threshold programming, etc., wherein machine learning can, for example, determine the number of freezers 230 corresponding to the sun-facing side and the shade-facing side of the greenhouse by determining the direction of sunlight exposure relative to the irradiation surface of the greenhouse.

[0071] According to a preferred embodiment, in the present invention, the refrigeration power of one or more freezers 230 in each annular array varies along the arrangement direction of the annular array as shown in Figure 4. In other words, multiple freezers 230 in the same annular array can have different refrigeration powers than multiple freezers 230 in adjacent annular arrays.

[0072] According to a preferred embodiment, in the present invention, the plurality of freezers 230 are divided into a plurality of groups in a ring array, which means that each group of the plurality of freezers 230 is connected to a corresponding inner frame base 220 to form a zigzag structure in the plane shown in FIG4 , further making the plurality of freezers 230 arranged in layers in the plane shown in FIG4 . That is, the plurality of freezers 230 are arranged in a concentric circle-like manner on each inner frame base 220 inside the outer frame base 210 .

[0073] Specifically, the sand layer on the outer side of a desert greenhouse experiences significant temperature fluctuations due to sunlight exposure, resulting in a large diurnal temperature difference. In contrast, the sand layer on the inner side experiences smaller temperature fluctuations due to the greenhouse's exterior facade blocking sunlight. Therefore, in terms of the stability of the sand layer foundation, the cooling power of the freezers 230 located closer to the outer periphery can be increased, thereby specifically maintaining the stability of the outer frame structure. Therefore, in the present invention, the cooling power of the multiple freezers 230 can decrease from the outer periphery to the inner periphery along the arrangement direction of the annular array. In other words, as shown in Figure 4, the freezers 230 located closer to the outer frame base 210 can have a greater cooling power than the freezers 230 located further away from the outer frame base 210. The outer annular array in the present invention refers to the freezers 230 located closer to the outer frame base 210 and corresponding to the inner frame base 220; the inner annular array refers to the freezers 230 located further away from the outer frame base 210 and corresponding to the inner frame base 220.

[0074] However, the improvement in overall structural stability and energy consumption reduction brought about by the configuration method for the refrigeration power of the freezer 230 may not be as expected. What is ignored is that the greenhouse frame has obvious temperature fluctuations due to the influence of sunlight compared to the outer side, especially the sunny side, so the closer to the sunny side of the greenhouse or the outside of the greenhouse, the more serious the evaporation of water in the sand layer. Therefore, when using the freezer 230 to condense the sand layer soil on this side, it is necessary to significantly increase water and electricity consumption to compensate for the loose structure of the sand layer caused by the large temperature increase and water loss. But even if the condensation strength is improved by increasing the output of the freezer 230, it is difficult for the condensed sand layer to maintain a stable high-strength form due to the continuous fluctuations in moisture and temperature, so the improvement in the overall structure of the greenhouse frame is not as expected, and as the external atmospheric temperature continues to change, water and electricity consumption also continues to fluctuate and cannot be accurately estimated. Therefore, it may involve frequently increasing or decreasing the refrigeration power of the peripheral freezer 230, which is also likely to have an impact on the service life of the freezer 230 itself. If freezer 230 is damaged and replaced, it will undoubtedly increase the workload significantly, which is the last thing managers want to see in a highly restrictive environment like the desert. In contrast, the inner sand layer of the greenhouse is shielded from sunlight, so the temperature difference between day and night is not as drastic as that of the outer sand layer. Furthermore, the soil inside the greenhouse provides some water, allowing the corresponding underground sand layer to easily maintain a relatively high humidity. This humidity environment is not easily fluctuated with continuous changes in the external environment. Therefore, freezer 230 is more likely to maintain the condensation and reinforcement of the inner sand layer of the greenhouse.

[0075] As a more preferred embodiment, in the present invention, the cooling power of the freezers 230 in the outer ring array can be lower than that of the freezers 230 in the inner ring array. In other words, to maintain overall structural stability and reduce the overconsumption of limited hydropower in desert regions, the freezers 230 located in the underground sand layer within the greenhouse can provide a more powerful cooling and condensing effect. Specifically, compared to increasing the cooling power of the outer freezers 230, the condensation structure of the inner sand layer is more easily maintained when the cooling power of the inner freezers 230 is increased, as the inner sand layer has a relatively stable humidity environment and its temperature fluctuations are not as drastic as those outside. Furthermore, while increasing the condensation strength of the inner sand layer, the condensation structure of the inner sand layer transfers its high humidity (or low / negative temperature) through the sand layer to the outer sand area, thereby promoting condensation of the outer sand layer. Furthermore, because the sand layer is a continuous structure, the condensed inner sand layer can rely on its relatively stable high strength to help the outer sand layer maintain its condensation state through the adjacent sand layer. More importantly, for desert environments, rationally planning energy allocation to reduce losses is extremely important. Compared to significantly increasing the cooling power of the freezer 230 in the outer ring array, increasing the cooling power of the inner ring freezer 230 can promote the reinforcement, formation, and maintenance of the outer sand layer through the stable high strength and relatively high humidity of the internal condensed sand layer, which can reduce the overall consumption of hydropower energy. In addition, improving or maintaining the structural stability of the internal underground sand layer can maintain the stability of the entire greenhouse skeleton structure, and the stability of the structure in this area contributes to the stability of the soil planting surface. Compared with the stability of the outer structure, the structural stability of the sand layer loaded with crops is more important because it directly affects the growth process of the crops.

[0076] According to a preferred embodiment, the above-ground frame 100 is mainly composed of a pipe rack structure, and the pipe rack uses pipes as raw materials. In particular, the pipes can use demoulding rods and square tubes to significantly save film pressing ropes. Specifically, referring to Figure 1, the above-ground frame 100 may include a plurality of vertical frames 110 and an arched frame 120. Furthermore, as shown in Figure 2, the plurality of vertical frames 110 are connected to the top surface of the frame outer base 210 in a substantially vertical manner along the zigzag structure gap of the frame outer base 210. In particular, the greenhouse facade structure shown in Figure 1 can be constructed using the plurality of vertical frames 110.

[0077] According to a preferred embodiment, a plurality of arched frames 120 are arranged above the underground frame 200 by connecting one or more vertical frames 110, thereby forming the roof covering structure of the greenhouse. Specifically, the arched frames 120 are preferably configured as a structure with a large span of continuous arches, that is, the distance between the two arch columns that make up a single arch is large, so that large machinery (such as planters and harvesters) can pass between the individual arches.

[0078] Optionally, for large-span arched skeleton structures, the distance between two arch columns of a single arch is, for example, no less than 8.5 meters. Furthermore, a continuous arch structure may not have an aisle in the middle. In other words, there is no spacing between two adjacent arched skeletons 120. In this case, the portion connecting two adjacent arched skeletons 120 can utilize the same arch column. In particular, the arch column can utilize a square tube. It should be understood that the above dimensions are merely illustrative and non-limiting examples and should not be construed as specific limitations of the present invention.

[0079] According to a preferred embodiment, the cladding structure constructed on the arched frame 120 of the present invention can include at least two layers: an outer cladding layer and an inner cladding layer. Specifically, the outer cladding layer is used to reduce light intensity or block some sunlight, and prevent impurities such as dust, sand, and rain from entering the greenhouse. The inner cladding layer can serve as an insulation layer, which can be used to maintain a suitable and stable temperature environment within the greenhouse. In particular, the inner cladding layer can be constructed as a double-layer insulation blanket structure.

[0080] According to a preferred embodiment, since pollutants such as sand and dust often accumulate on the outer covering layer, which is particularly serious in desert areas, the outer covering layer can be constructed as a slope structure that is at least partially inclined toward the ground. The slope structure can be achieved by utilizing the curvature of the arch structure itself. In addition, the outer covering layer is made of low-adhesion cloth or plastic and other materials, so that sand and dust particles can slide down along the slope of the outer covering layer to avoid accumulation.

[0081] Preferably, the connecting portion of the arches, i.e., the arch columns between adjacent arched frames 120, can be constructed as a hollow structure, allowing the outer cladding to connect with the columns in a manner that directs dust into the hollow arch columns. Specifically, the outer cladding connects to the outer edges of the tops of the columns, leaving the hollow openings exposed. This structure allows dust scattered on the outer cladding to slide down the slope of the outer cladding and, along the arch structure, to the central arch columns, where it is then directed to the ground or underground through the hollow arch columns. This solution has the advantages of enabling self-cleaning of the greenhouse facade, preventing large amounts of dust from accumulating on the greenhouse roof and damaging the structure, and reducing light obstruction. Furthermore, the hollow arch columns can retain a large amount of air. Due to air's poor thermal conductivity, they provide excellent insulation, storing heat during the day and releasing it at night, helping plants maintain a suitable temperature at night. This is extremely important in desert regions, where the temperature difference between day and night is significant.

[0082] Furthermore, the grounded end of the arch column is inserted into the sand layer and connected to a corresponding insulation pool installed below the ground. The insulation pool is used to store thermal storage materials, which can store heat during the day and release heat at night to replenish the indoor temperature. In desert areas, the most economical and environmentally friendly thermal storage material is sand. Therefore, the sand and dust flowing down from the roof of the greenhouse can be discharged into the underground insulation pool as a supplementary source of thermal storage material, reducing the maintenance cost of the insulation pool contents and improving the system's self-sustaining ability in extreme environments.

[0083] According to a preferred embodiment, the outer covering layer can be made of a membrane material such as a plastic film, and the inner covering layer can be made of a material commonly used in building insulation and greenhouse insulation, and preferably a fire-resistant and fireproof material.

[0084] According to a preferred embodiment, corresponding to the at least two-layer covering structure, in the present invention, the arched frame 120 can also be configured as a double-layer structure, and correspondingly referred to as an inner dome and an outer dome. Specifically, each layer of the arched frame 120 can be used to install at least one covering layer.

[0085] According to a preferred embodiment, when the double-layer quilt structure is not in use, it can be rolled up by, for example, a rolling machine. In particular, the rolling machine can automatically roll up the quilt in an electric manner. A special example of a rolling machine is a low-weight rolling machine, which includes an axis connected to the double-layer thermal insulation quilt and several moving components that can move on the inner dome pipe frame structure. The moving components can be driven by a drive device (such as a motor) to move along the inner dome pipe frame, thereby driving the axis of the double-layer thermal insulation quilt to roll it up.

[0086] According to a preferred embodiment, the desert greenhouse framework shown in Figures 1 to 4 can be constructed according to the following steps, specifically:

[0087] The outer frame base 210 of the underground frame 200 is placed on a sand surface or in a sand layer, and a plurality of base columns 211 connected thereto are at least partially inserted into the sand layer to stabilize the outer frame base 210;

[0088] A plurality of freezers 230 are attached to the respective inner bases 220 of the underground framework 200 in a predetermined ring array arrangement rule and at least partially inserted into the sand layer;

[0089] Arrange a plurality of humidification pipes 240 inside the outer matrix 210 of the underground framework 200;

[0090] selectively controlling each freezer 230 to freeze the humidified sand layer;

[0091] Connecting the plurality of vertical frames 110 of the above-ground frame 100 substantially vertically to the outer frame base 210 of the underground frame 200, and constructing a plurality of arch frames 120 between the plurality of vertical frames 110;

[0092] The facade and top surface of the desert greenhouse are constructed by using the vertical frame 110 and the arch frame 120 .

[0093] Optionally, after the sand layer is humidified by using the humidification pipeline 240 , the sand layer may be compacted and leveled to a certain extent.

[0094] In particular, when constructing the greenhouse frame described in the present invention, a chemical agent that can solidify sand can be added to the excavated sand pit foundation in advance to solidify the sand in the corresponding part to form a relatively solid sand wall, thereby facilitating subsequent construction.

[0095] According to a preferred embodiment, the desert greenhouse skeleton system provided by the present invention also includes a ventilation unit that utilizes a roll-film ventilation assembly. Specifically, the roll-film ventilation assembly can be installed on the east and west sides of the greenhouse and controlled by a motorized roll-film mechanism, thereby opening and closing the vents on the east and west sides and the top of the greenhouse. Furthermore, an axial flow fan can be installed on the south side of the greenhouse, and a wet curtain can be installed on the north side of the greenhouse. The wet curtain has a water outlet and a water inlet, with the water outlet located at a high point of gravitational potential energy and the water inlet located at a low point of gravitational potential energy. Water flows through the wet curtain surface, entering through the water inlet and exiting through the water outlet, forming a circulation system in conjunction with a pump, thereby forming a water curtain on the wet curtain surface. A fan is installed on the back of the wet curtain to blow air through the water curtain. Specifically, during high temperatures, the axial flow fan drives outdoor air through the wet curtain into the greenhouse, where the sensible heat of the air is converted into latent heat, thereby delivering cool air to the greenhouse for cooling. Preferably, the steam released into the environment by plant transpiration can be condensed and recovered, and the recovered liquid can be transported to the wet curtain as raw material, thereby realizing the recycling of on-site resources.

[0096] According to a preferred embodiment, the desert greenhouse skeleton system provided by the present invention also includes a heating unit, which may include an active heat storage and release module, a solar heat collection module and an electromagnetic heating module. Specifically, the active heat storage and release module includes a crop root base heating pipe and an air heating pipe. The crop root base heating pipe can be a heat pipe, which is arranged at the roots of the plant to provide heat to the roots of the plant. The air heating pipe can be an air heating plate, which can be arranged on the circumferential side and top surface of the greenhouse, and is preferably arranged near the plant canopy to simultaneously achieve heating of the plant canopy, so that the temperature of the plant roots and the canopy are suitable, thereby promoting crop growth. The electromagnetic heating module can be set in a heat storage tank. When the temperature supplied by the heat storage tank is insufficient, the electromagnetic heating module is started to heat the insulation material to raise it to the required temperature.

[0097] Example 2

[0098] This embodiment is a further improvement of the content of embodiment 1, and the repeated content will not be repeated.

[0099] The present invention provides a desert greenhouse skeleton control method based on the desert greenhouse skeleton system described in Example 1, which may include the following steps:

[0100] Arrange a plurality of freezers 230 into a plurality of groups in a ring array manner, and attach each group of freezers 230 to the underground frame 200 of the greenhouse frame;

[0101] Acquiring sand layer temperature data associated with the greenhouse framework in a manner associated with the distribution locations of the freezers 230;

[0102] The freezing parameters of the freezers 230 are dynamically adjusted based on the sand layer temperature data and / or the distribution locations of the freezers 230 in the annular array.

[0103] According to a preferred embodiment, the step of dynamically adjusting the freezing parameters of the freezer 230 based on the sand layer temperature data and / or the distribution positions of the freezer 230 in the annular array may include:

[0104] The freezing parameters of one or more freezers 230 in each ring array are dynamically adjusted in time based on the change in sand layer temperature caused by the change in sunlight trajectory.

[0105] According to a preferred embodiment, the step of dynamically adjusting the freezing parameters of the freezer 230 based on the sand layer temperature data and / or the distribution positions of the freezer 230 in the annular array further includes:

[0106] The one or more freezers 230 are controlled to have varying refrigeration capacities in the arrangement direction of the annular array.

[0107] Those skilled in the art will appreciate that, as long as the objectives of the present invention can be achieved, other steps or operations may be included before, after, or between the steps, for example, to further optimize and / or improve the method of the present invention. Furthermore, although the method of the present invention is shown and described as a series of actions performed in sequence, it should be understood that the method is not limited by sequence. For example, some actions may occur in an order different from that described herein. Alternatively, one action may occur simultaneously with another action.

[0108] It should be noted that the above-mentioned specific embodiments are exemplary, and those skilled in the art can come up with various solutions inspired by the disclosure of the present invention, and these solutions also fall within the scope of the disclosure of the present invention and fall within the scope of protection of the present invention. Those skilled in the art should understand that the present invention specification and its drawings are illustrative and do not constitute a limitation on the claims. The scope of protection of the present invention is defined by the claims and their equivalents. The present invention specification contains multiple inventive concepts, such as "preferably", "according to a preferred embodiment" or "optionally", which means that the corresponding paragraph discloses an independent concept, and the applicant reserves the right to file a divisional application based on each inventive concept.

Claims

1. A desert greenhouse framework system, characterized in that: include: A greenhouse frame, comprising a detachably assembled above-ground frame (100) and an underground frame (200); A plurality of freezers (230) operably attached to the underground framework (200), arranged in a plurality of groups in a ring array and at least partially embedded in the sand layer; A controller is communicatively coupled to the freezer (230) and is configured to dynamically adjust freezing parameters of the freezer (230) based on the temperature of the sand layer and / or the distribution position of the freezer (230) in the annular array.

2. The desert greenhouse skeleton system according to claim 1, characterized in that: The controller is configured to dynamically adjust the freezing parameters of one or more freezers (230) in each ring array in time based on the change of sand layer temperature caused by the change of sunlight trajectory.

3. The desert greenhouse skeleton system according to claim 1 or 2, characterized in that: The refrigeration power of the partial freezer (230) corresponding to the sunny side of the greenhouse frame that is temporally related to the sunlight track is greater than the refrigeration power of the partial freezer (230) corresponding to the shady side thereof.

4. The desert greenhouse skeleton system according to any one of claims 1 to 3, characterized in that: The controller dynamically adjusts the freezing parameters of the freezer (230) based on the distribution positions of the freezer (230) in the annular array, including controlling the plurality of freezers (230) to have varying refrigeration powers in the arrangement direction of the annular array.

5. The desert greenhouse skeleton system according to any one of claims 1 to 4, characterized in that: The refrigeration power of one or more freezers (230) in the outer annular array is less than the refrigeration power of one or more freezers (230) in the inner annular array.

6. The desert greenhouse skeleton system according to any one of claims 1 to 5, characterized in that: It also includes operable humidification pipelines (240), wherein a plurality of humidification pipelines (240) are connected to the underground skeleton (200) in an alternating manner.

7. The desert greenhouse skeleton system according to any one of claims 1 to 6, characterized in that: The freezer (230) comprises: Hot end protective sleeve (234); a cold end protection sleeve (233) arranged radially outside the hot end protection sleeve (234); A plurality of semiconductor cooling sheets (231) are arranged in the axial direction and the circumferential direction on the hot end protection sleeve (234) and between the cold end protection sleeve (233).

8. The desert greenhouse skeleton system according to any one of claims 1 to 7, characterized in that: The plurality of semiconductor cooling sheets (231) can be connected to each other via a flexible circuit (232) to form a plurality of annular arrays along the axial direction of the hot end protection sleeve (234) and / or the cold end protection sleeve (233).

9. A desert greenhouse framework control method, characterized in that: include: Arrange a plurality of freezers (230) into a plurality of groups in a ring array manner, and attach each group of freezers (230) to an underground frame (200) of a greenhouse frame; Acquiring sand layer temperature data associated with the greenhouse framework in a manner associated with the distribution position of the freezer (230); The freezing parameters of the freezer (230) are dynamically adjusted based on the sand layer temperature data and / or the distribution positions of the freezer (230) in the annular array.

10. The desert greenhouse framework control method according to claim 9, characterized in that: The dynamically adjusting the freezing parameters of the freezer (230) based on the sand layer temperature data and / or the distribution position of the freezer (230) comprises: Dynamically adjusting the freezing parameters of one or more freezers (230) in each annular array in time based on the change in sand layer temperature caused by the change in sunlight trajectory; and / or The plurality of freezers (230) are provided with varying refrigeration powers in the arrangement direction of the annular array.

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