Greenhouse agricultural environment layered precision monitoring device

Abstract

The application discloses a greenhouse agricultural environment layered precision monitoring device, aiming at solving the problems that the prior art cannot detect the greenhouse environment parameters with full height precision, the gas exchange device has high energy consumption, and the natural temperature difference is not effectively utilized. The instrument core comprises a vertical environment monitoring column, a servo motor driven reciprocating screw rod, a lifting monitor, a plurality of groups of magnetic force valves arranged longitudinally and an exhaust fan. The reciprocating screw rod drives the axial reciprocating movement of the lifting monitor. The magnetic repulsion force is used for accurately opening and closing the magnetic force valve at the corresponding height. The built-in temperature and humidity and carbon dioxide sensors are used for realizing the accurate detection of the environment parameters at different heights of the greenhouse. Meanwhile, the exhaust fan and the screw rod can be driven by the temperature difference between the inside and outside of the greenhouse, so that the power-free gas exchange and detection are realized, the operation energy consumption is greatly reduced, and the detection precision and energy-saving and environment-friendly characteristics are combined.

Description

Technical Field

[0001] This invention relates to the field of agricultural environmental monitoring technology, and in particular to a stratified precision monitoring device for the agricultural environment in greenhouses. Background Technology

[0002] Greenhouses, as important agricultural production facilities, provide suitable growing environments for crops, improving crop yield and quality. However, greenhouses are typically enclosed or semi-enclosed, with poor internal air circulation, easily leading to stratification of environmental parameters. For example, due to the effects of plant photosynthesis and respiration, parameters such as carbon dioxide concentration, humidity, and temperature may vary significantly at different heights. Traditional environmental monitoring instruments are usually fixed at a single location, making it difficult to comprehensively and accurately reflect the environmental conditions inside the greenhouse.

[0003] In addition, when greenhouses are used in autumn and winter, there is a large temperature difference between the inside and outside. Traditional monitoring equipment often requires a lot of energy to drive components such as fans or pumps for gas exchange, which increases operating costs. At the same time, existing gas exchange devices usually cannot achieve precise control, which can easily lead to heat loss or insufficient carbon dioxide replenishment, affecting crop growth.

[0004] Therefore, the existing technology has the following technical problems: First, it cannot achieve accurate detection of environmental parameters at all heights inside the greenhouse; second, the gas exchange device has high energy consumption and is not energy-saving and emission-reducing enough; and third, it does not effectively utilize natural temperature differences for non-powered gas exchange. Summary of the Invention

[0005] The technical problem to be solved by this invention is that it is impossible to accurately detect environmental parameters at all heights inside the greenhouse; the gas exchange device has high energy consumption and is not energy-saving and emission-reducing enough; and it does not effectively utilize natural temperature differences for non-powered gas exchange. Therefore, we propose a stratified and precise monitoring device for the agricultural environment in greenhouses.

[0006] To achieve the above objectives, this application adopts the following technical solution: A precision monitoring device for stratified agricultural environment in greenhouses includes a vertically arranged environmental monitoring column with an opening at the top. A servo motor is fixedly installed at the bottom of the environmental monitoring column. The output shaft of the servo motor is driven by a vertically arranged reciprocating screw. The reciprocating screw passes through the inner cavity of the environmental monitoring column, and an exhaust fan is driven by the upper end of the reciprocating screw. A lifting monitor is connected to the reciprocating screw via a screw nut. The lifting monitor is cylindrical and has an air extraction hole on its side wall. The lifting monitor can reciprocate within the inner cavity of the environmental monitoring column along the axis of the reciprocating screw with the screw nut. Several magnetic valves are arranged longitudinally on one side wall of the environmental monitoring column. Each magnetic valve has an air outlet that communicates with the inner cavity of the environmental monitoring column and an air inlet that communicates with the external environment. The inner cavity of the magnetic valve is arranged in sequence along the air inlet direction with filter cotton, fixed baffle and movable valve plate. The movable valve plate is inlaid with a first magnet and the fixed baffle is inlaid with a second magnet. The first magnet and the second magnet are magnetically repulsive. The fixed baffle is provided with several vent holes. A third magnet is embedded in the side wall of the lifting monitor facing the magnetic valve. The third magnet and the first magnet are magnetically repulsive, and the magnetic repulsion force of the third magnet on the first magnet is greater than that of the second magnet on the first magnet. The top of the lifting monitor is equipped with a rubber baffle, the outer edge of which is in contact with the inner wall of the environmental monitoring column.

[0007] Furthermore, the inner wall of the lifting monitor is integrally formed with a cross-shaped inner tie rod, and the inner side wall of the lifting monitor is rotatably connected with several limit wheels. Each pair of limit wheels forms a group, and the wheel surfaces of the two limit wheels in each group roll and fit against the two opposite sides of a single inner tie rod.

[0008] Furthermore, a total of eight sets of limiting wheels are set, with one set of limiting wheels corresponding to the upper and lower ends of the four inner tie rods.

[0009] Furthermore, a sensor mounting base is fixed inside the lifting monitor, and a temperature sensor, a humidity sensor, and a carbon dioxide sensor are fixedly connected to the sensor mounting base. The detection probes of each sensor are all facing the central area of ​​the lifting monitor's inner cavity.

[0010] Furthermore, the outer diameter of the movable valve plate is larger than the inner diameter of the air outlet, the fixed baffle is interference-fitted to the inner wall of the magnetic valve, the vent holes are evenly opened along the circumference of the fixed baffle, the second magnet is embedded in the center of the fixed baffle, the first magnet is embedded in the center of the movable valve plate, and the first magnet and the second magnet are coaxially opposite each other.

[0011] Furthermore, the rubber baffle is a ring-shaped elastic structure. The inner ring of the rubber baffle is fixedly connected to the top end face of the lifting monitor by fasteners, and the outer edge of the outer ring of the rubber baffle is in interference contact with the inner wall of the environmental monitoring column.

[0012] Furthermore, the side wall of the environmental monitoring column has mounting holes that are the same number as the number of magnetic valves. The mounting holes are arranged at equal intervals along the longitudinal direction of the environmental monitoring column. Each magnetic valve is connected to a mounting hole with a corresponding threaded seal. The air outlet is located on one side of the inner cavity of the environmental monitoring column, and the air inlet is located on one side of the outer wall of the environmental monitoring column.

[0013] Furthermore, a rain cover is installed on the top of the environmental monitoring column. The rain cover has a conical structure and is fixedly connected to the top outer wall of the environmental monitoring column by several circumferentially evenly arranged legs. The horizontal projection of the rain cover completely covers the upper opening of the environmental monitoring column.

[0014] Furthermore, a speed reducer is connected between the upper end of the reciprocating lead screw and the exhaust fan, and a one-way coupling is also provided between the output shaft of the servo motor and the reciprocating lead screw.

[0015] Furthermore, an inspection port is provided at the bottom of the environmental monitoring column, which is connected to the inner cavity of the environmental monitoring column. A sealing cover is detachably connected to the inspection port, and a sealing gasket is provided between the sealing cover and the edge of the inspection port.

[0016] The technical effects and advantages of this invention are as follows: 1. By driving the reciprocating screw to rotate via a servo motor, the lifting monitor moves axially back and forth within the environmental monitoring column. Simultaneously, in conjunction with the on / off control of the magnetic valve, it enables the individual detection of environmental parameters at different heights within the greenhouse, effectively solving the problem of inaccurate detection caused by the stratification of environmental parameters.

[0017] 2. The opening and closing of the movable valve plate is controlled by the magnetic repulsion between the third magnet and the first magnet, so as to achieve precise control of the gas inflow. While detecting, the internal exhaust gas is discharged and fresh air is replenished, which improves the air quality in the greenhouse. When the temperature difference is large in autumn and winter, there is no need to start the servo motor. The hot air rising from the temperature difference between the inside and outside can drive the exhaust fan to rotate, realizing gas exchange without power, which is more energy-saving and environmentally friendly. Attached Figure Description

[0018] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts: Figure 1 This is a schematic diagram of the external structure of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 For the present invention Figure 2 Enlarged structural diagram at point B; Figure 5 This is a cross-sectional view of the lifting monitoring device of the present invention; Figure 6 This is a schematic diagram of the magnetic valve structure of the present invention; Figure 7 For the present invention Figure 6Enlarged structural diagram at point C.

[0019] Legend: 1. Environmental monitoring column; 101. Internal tie rod; 2. Servo motor; 3. One-way coupling; 4. Reciprocating lead screw; 5. Reducer; 6. Exhaust fan; 7. Lead screw nut; 8. Lifting monitor; 9. Limit wheel; 10. Magnetic valve; 1001. Air outlet; 1002. Movable valve plate; 1003. First magnet; 1004. Fixed baffle; 1005. Vent hole; 1006. Second magnet; 1007. Filter cotton; 1008. Air inlet; 11. Third magnet; 12. Rubber baffle; 13. Air extraction hole; 14. Rain cover; 15. Inspection port. Detailed Implementation

[0020] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of this application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] Example 1, refer to Figures 1 to 7 This embodiment provides a stratified precision monitoring device for agricultural environment in greenhouses, including a vertically arranged environmental monitoring column 1. The environmental monitoring column 1 has a cylindrical structure and is vertically fixed inside the greenhouse. It has an opening at the top for venting gas. A servo motor 2 is fixedly installed at the bottom of the environmental monitoring column 1. The output shaft of the servo motor 2 is connected to a vertically arranged reciprocating screw 4 through a one-way coupling 3. The function of the one-way coupling 3 is that when the reciprocating screw 4 rotates under the action of external power, it will not drive the servo motor 2 to rotate, thereby avoiding resistance or damage to the servo motor 2.

[0022] The reciprocating lead screw 4 passes through the inner cavity of the environmental monitoring column 1. Its upper end is connected to the exhaust fan 6 via a reducer 5. The reducer 5 is used to increase torque and reduce speed to ensure that the exhaust fan 6 can operate stably. The exhaust fan 6 is fixedly installed at the top opening of the environmental monitoring column 1 to discharge the gas inside the environmental monitoring column 1 to the outside.

[0023] A lifting monitor 8 is connected to the reciprocating screw 4 via a screw nut 7. The lifting monitor 8 is cylindrical and has multiple air extraction holes 13 on its side wall. The lifting monitor 8 can move back and forth along the axis of the reciprocating screw 4 within the inner cavity of the environmental monitoring column 1 with the screw nut 7, thereby realizing the detection of different height positions.

[0024] Several magnetic valves 10 are arranged longitudinally on one side wall of the environmental monitoring column 1. In this embodiment, there are five magnetic valves 10, which are arranged at equal intervals along the longitudinal direction of the environmental monitoring column 1. Each magnetic valve 10 is provided with an air outlet 1001 and an air inlet 1008. The air outlet 1001 is connected to the inner cavity of the environmental monitoring column 1, and the air inlet 1008 is connected to the internal environment of the greenhouse.

[0025] The inner cavity of the magnetic valve 10 is provided with a filter cotton 1007, a fixed baffle 1004 and a movable valve plate 1002 arranged sequentially along the air intake direction. The filter cotton 1007 is used to filter suspended dust and impurities in the air to ensure that the gas entering the instrument is clean. The fixed baffle 1004 is press-fitted to the inner wall of the magnetic valve 10 and has several vent holes 1005. The vent holes 1005 are evenly opened along the circumference of the fixed baffle 1004 to ensure that the gas can pass through evenly. The movable valve plate 1002 is movably installed above the fixed baffle 1004 and can move up and down under the action of magnetic force.

[0026] A first magnet 1003 is embedded in the movable valve plate 1002, and the first magnet 1003 is embedded in the center of the movable valve plate 1002. A second magnet 1006 is embedded in the fixed baffle plate 1004, and the second magnet 1006 is embedded in the center of the fixed baffle plate 1004. The first magnet 1003 and the second magnet 1006 are magnetically repulsive, that is, their opposite ends are like magnetic poles. Since the first magnet 1003 is located on the movable valve plate 1002, the movable valve plate 1002 has a downward tendency under the magnetic repulsion of the second magnet 1006, thereby blocking the air outlet 1001.

[0027] A third magnet 11 is embedded in the side wall of the lifting monitor 8 facing the magnetic valve 10. The third magnet 11 is magnetically repulsive to the first magnet 1003, and the magnetic repulsion force of the third magnet 11 on the first magnet 1003 is greater than the magnetic repulsion force of the second magnet 1006 on the first magnet 1003. When the lifting monitor 8 rises to a certain height, when the third magnet 11 on its side wall is opposite to the first magnet 1003 in the corresponding magnetic valve 10, the magnetic repulsion force of the third magnet 11 on the first magnet 1003 overcomes the magnetic repulsion force of the second magnet 1006 on the first magnet 1003, pushing the movable valve plate 1002 to move upward, thereby opening the air outlet 1001 and allowing external gas to enter the inner cavity of the environmental monitoring column 1.

[0028] A rubber baffle 12 is provided on the top of the lifting monitor 8. The rubber baffle 12 is an annular sheet-shaped elastic structure. Its inner ring is fixedly connected to the top end face of the lifting monitor 8 by fasteners, and its outer edge is in interference contact with the inner wall of the environmental monitoring column 1 to ensure airtightness and prevent gas from leaking from the gap between the lifting monitor 8 and the inner wall of the environmental monitoring column 1.

[0029] A sensor mounting base is fixed inside the lifting monitor 8, and a temperature sensor, a humidity sensor, and a carbon dioxide sensor are fixedly connected to the sensor mounting base. The detection probes of each sensor face the center area of ​​the inner cavity of the lifting monitor 8, and are used to detect parameters such as temperature, humidity, and carbon dioxide concentration of the gas entering the lifting monitor 8.

[0030] The top of the environmental monitoring column 1 is equipped with a rain cover 14. The rain cover 14 has a conical structure and is fixedly connected to the top outer wall of the environmental monitoring column 1 by several circumferentially evenly arranged support legs. The horizontal projection of the rain cover 14 completely covers the upper opening of the environmental monitoring column 1, which can prevent rainwater from falling directly into the interior of the environmental monitoring column 1 and protect the internal equipment.

[0031] An inspection port 15 is provided at the bottom of the environmental monitoring column 1, and the inspection port 15 communicates with the inner cavity of the environmental monitoring column 1. A sealing cover is detachably connected to the inspection port 15, and a sealing gasket is provided between the sealing cover and the edge of the inspection port 15 to ensure airtightness. The inspection port 15 facilitates the maintenance and repair of internal equipment such as the servo motor 2 and the one-way coupling 3.

[0032] The working principle of this embodiment is as follows: In use, the environmental monitoring column 1 is vertically fixed inside the greenhouse, with its top extending beyond the top of the greenhouse. First, the servo motor 2 is started. The servo motor 2 drives the reciprocating screw 4 to rotate through the one-way coupling 3. The rotation of the reciprocating screw 4 drives the lifting monitor 8 to move up or down through the screw nut 7. At the same time, the reciprocating screw 4 drives the exhaust fan 6 to rotate through the reducer 5, expelling the gas inside the environmental monitoring column 1 to the outside.

[0033] When the lifting monitor 8 moves to a certain height, the third magnet 11 on its side wall is opposite to the first magnet 1003 in the corresponding magnetic valve 10. Since the magnetic repulsion force of the third magnet 11 on the first magnet 1003 is greater than the magnetic repulsion force of the second magnet 1006 on the first magnet 1003, the movable valve plate 1002 is pushed away from the fixed baffle 1004, the air outlet 1001 is opened, and the air inside the greenhouse enters the magnetic valve 10 through the air inlet 1008. First, it is filtered by the filter cotton 1007 to remove suspended dust, and then it enters the inner cavity of the environmental monitoring column 1 through the vent 1005 and the air outlet 1001.

[0034] Because the outer edge of the rubber baffle 12 is attached to the inner wall of the environmental monitoring column 1, the gas can only enter the interior of the lifting monitor 8 through the air extraction hole 13 on the side wall of the lifting monitor 8. Inside the lifting monitor 8, the gas comes into contact with various sensors, and the sensors detect environmental parameters such as temperature, humidity, and carbon dioxide concentration. Subsequently, the gas continues to flow upward and is discharged outside the greenhouse through the exhaust fan 6.

[0035] As the lifting monitor 8 continues to rise and moves away from the magnetic valve 10, the distance between the third magnet 11 and the first magnet 1003 increases, and the magnetic repulsion weakens. At this time, the magnetic repulsion of the second magnet 1006 on the first magnet 1003 plays a dominant role, pushing the movable valve plate 1002 to move downward and block the air outlet 1001. The magnetic valve 10 closes. Only when the lifting monitor 8 moves to the corresponding height will the corresponding magnetic valve 10 open, thus realizing the accurate detection of environmental parameters at different heights in the greenhouse.

[0036] In autumn and winter when there are large temperature differences, the servo motor 2 can be turned off. The hot air rising from the temperature difference between the inside and outside of the greenhouse will drive the exhaust fan 6 to rotate. The rotation of the exhaust fan 6 will drive the reciprocating screw 4 to rotate through the reducer 5. The screw nut 7 will drive the lifting monitor 8 to move slowly, realizing gas exchange and detection without power. At this time, the one-way coupling 3 ensures that the servo motor 2 will not generate resistance to the rotation of the reciprocating screw 4.

[0037] Example 2: This example further optimizes the structure of the lifting monitor 8 based on Example 1. (Refer to...) Figure 4 The inner wall of the lifting monitor 8 is integrally formed with a cross-shaped inner rib 101. The cross-shaped inner rib 101 can enhance the structural strength of the lifting monitor 8. At the same time, four evenly distributed spaces are formed between the inner rib 101 and the inner wall of the lifting monitor 8, which facilitates the installation of sensors and the flow of gas.

[0038] The inner wall of the lifting monitor 8 is rotatably connected with several limiting wheels 9. In this embodiment, eight sets of limiting wheels 9 are provided, with two limiting wheels 9 forming a set. The wheel surfaces of the two limiting wheels 9 in each set roll and fit against the two opposite sides of a single rib of the inner tie rod 101. A set of limiting wheels 9 is provided at the upper and lower ends of each of the four ribs of the inner tie rod 101. The setting of the limiting wheels 9 enables the lifting monitor 8 to move smoothly along the guide of the inner tie rod 101 when it moves axially along the reciprocating screw 4, preventing the lifting monitor 8 from rotating or deviating and ensuring the accuracy of the detection.

[0039] Example 3: Based on Example 1 or 2, this example further describes in detail the specific structure of the magnetic valve 10.

[0040] The outer diameter of the movable valve plate 1002 is larger than the inner diameter of the air outlet 1001. When the movable valve plate 1002 moves downward under the magnetic repulsion of the second magnet 1006, it can completely block the air outlet 1001 to prevent gas leakage. The fixed baffle 1004 is interference-fitted to the inner wall of the magnetic valve 10 to ensure a firm connection and prevent movement under gas pressure.

[0041] Vent holes 1005 are evenly spaced along the circumference of the fixed baffle 1004 to allow gas to pass through uniformly and prevent excessive local airflow. A second magnet 1006 is embedded in the center of the fixed baffle 1004, and a first magnet 1003 is embedded in the center of the movable valve plate 1002. The first magnet 1003 and the second magnet 1006 are coaxially opposite each other, ensuring that the magnetic repulsion between them is perpendicular to the moving direction of the movable valve plate 1002, allowing the movable valve plate 1002 to move vertically up and down, ensuring a sealing effect.

[0042] The side wall of the environmental monitoring column 1 has mounting holes in the same number as the magnetic valves 10. The mounting holes are arranged at equal intervals along the longitudinal direction of the environmental monitoring column 1. Each magnetic valve 10 is connected to a mounting hole with a corresponding threaded seal, which facilitates disassembly and maintenance. The air outlet 1001 is located on one side of the inner cavity of the environmental monitoring column 1, and the air inlet 1008 is located on one side of the outer wall of the environmental monitoring column 1 to ensure clear gas flow direction.

[0043] Through the description of the above embodiments, those skilled in the art can clearly understand the specific implementation of each technical feature of the present invention. A sensor mounting base is fixed within the inner cavity of the lifting monitor 8. A temperature sensor, a humidity sensor, and a carbon dioxide sensor are fixedly connected to the sensor mounting base. The detection probes of each sensor face the central area of ​​the inner cavity of the lifting monitor 8 for comprehensive detection of environmental parameters.

[0044] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A stratified precision monitoring device for agricultural environments in greenhouses, comprising vertically arranged environmental monitoring columns, characterized in that, The environmental monitoring column has an opening at the top and a servo motor is fixedly installed at the bottom. The output shaft of the servo motor is driven by a vertically arranged reciprocating screw. The reciprocating screw passes through the inner cavity of the environmental monitoring column and an exhaust fan is driven by the upper end of the reciprocating screw. A lifting monitor is connected to the reciprocating screw via a screw nut. The lifting monitor is cylindrical and has an air extraction hole on its side wall. The lifting monitor can reciprocate within the inner cavity of the environmental monitoring column along the axial direction of the reciprocating screw with the screw nut. Several magnetic valves are arranged longitudinally on one side wall of the environmental monitoring column. Each magnetic valve has an air outlet communicating with the inner cavity of the environmental monitoring column and an air inlet communicating with the external environment. The inner cavity of the magnetic valve is provided with filter cotton, fixed baffle and movable valve plate in sequence along the air inlet direction. A first magnet is embedded on the movable valve plate and a second magnet is embedded on the fixed baffle. The first magnet and the second magnet are magnetically repulsive. Several vent holes are opened on the fixed baffle. The lifting monitor has a third magnet embedded in the side wall facing the magnetic valve. The third magnet is magnetically repulsive to the first magnet, and the magnetic repulsion force of the third magnet on the first magnet is greater than that of the second magnet on the first magnet. The top of the lifting monitor is equipped with a rubber baffle, and the outer edge of the rubber baffle is in contact with the inner wall of the environmental monitoring column.

2. The greenhouse agricultural environment stratified precision monitoring device according to claim 1, characterized in that, The inner wall of the lifting monitor is integrally formed with a cross-shaped inner tie. The inner side wall of the lifting monitor is rotatably connected with several limiting wheels. Each pair of limiting wheels forms a group, and the wheel surfaces of the two limiting wheels in each group roll and fit against the two opposite sides of a single inner tie.

3. The greenhouse agricultural environment stratified precision monitoring device according to claim 2, characterized in that, A total of eight sets of limiting wheels are provided, with one set of limiting wheels corresponding to the upper and lower ends of each of the four ribs of the inner tie rod.

4. The greenhouse agricultural environment stratified precision monitoring device according to claim 1, characterized in that, The inner cavity of the lifting monitor is fixed with a sensor mounting base, on which a temperature sensor, a humidity sensor, and a carbon dioxide sensor are fixedly connected. The detection probes of each sensor are all facing the central area of ​​the inner cavity of the lifting monitor.

5. The greenhouse agricultural environment stratified precision monitoring device according to claim 1, characterized in that, The outer diameter of the movable valve plate is larger than the inner diameter of the air outlet. The fixed baffle is interference-fitted to the inner wall of the magnetic valve. The vent holes are evenly opened along the circumference of the fixed baffle. The second magnet is embedded in the center of the fixed baffle. The first magnet is embedded in the center of the movable valve plate. The first magnet and the second magnet are coaxially opposite each other.

6. The greenhouse agricultural environment stratified precision monitoring device according to claim 1, characterized in that, The rubber baffle is an annular sheet-shaped elastic structure. The inner ring of the rubber baffle is fixedly connected to the top end face of the lifting monitor by fasteners, and the outer edge of the outer ring of the rubber baffle is in interference contact with the inner wall of the environmental monitoring column.

7. The greenhouse agricultural environment stratified precision monitoring device according to claim 1, characterized in that, The side wall of the environmental monitoring column has mounting holes that are the same number as the number of magnetic valves. The mounting holes are arranged at equal intervals along the longitudinal direction of the environmental monitoring column. Each magnetic valve is threaded and sealed in one mounting hole. The air outlet is located on one side of the inner cavity of the environmental monitoring column, and the air inlet is located on one side of the outer wall of the environmental monitoring column.

8. The greenhouse agricultural environment stratified precision monitoring device according to claim 1, characterized in that, The top of the environmental monitoring column is equipped with a rain cover. The rain cover has a conical structure and is fixedly connected to the top outer wall of the environmental monitoring column by several circumferentially evenly arranged legs. The horizontal projection of the rain cover completely covers the upper opening of the environmental monitoring column.

9. The greenhouse agricultural environment stratified precision monitoring device according to claim 1, characterized in that, A speed reducer is connected between the upper end of the reciprocating lead screw and the exhaust fan, and a one-way coupling is also provided between the output shaft of the servo motor and the reciprocating lead screw.

10. The greenhouse agricultural environment stratified precision monitoring device according to claim 1, characterized in that, The environmental monitoring column has an inspection port at its bottom, which is connected to the inner cavity of the environmental monitoring column. A sealing cover is detachably connected to the inspection port, and a sealing gasket is provided between the sealing cover and the edge of the inspection port.

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