A gas sampling device for an intelligent greenhouse monitoring system

Abstract

The present invention discloses a gas sampling device for an intelligent greenhouse monitoring system, which comprises: an outer frame, the side of which is assembled by a combination of greenhouse side panels, and half-open doors are symmetrically installed on the outer frame; an inner bottom plate, which is horizontally suspended inside the outer frame; gas sampling units, which are distributed on the inner walls of each side panel of the outer frame; a breathing air supply unit, which is installed in the middle of the inner bottom plate, and is connected to each of the gas sampling units; the breathing air supply unit mainly provided in the present invention can effectively promote the circulation and exchange of gases such as CO₂ and O₂ in the greenhouse system by rhythmically inhaling and exhausting air, thereby ensuring the uniformity and stability of the gas environment in the greenhouse, thereby providing more stable and accurate detection results in the subsequent gas sampling process.

Description

Technical Field

[0001] The present invention belongs to the technical field of gas sampling, and in particular is a gas sampling device for an intelligent greenhouse monitoring system. Background Art

[0002] Since the mid-1990s, with the rapid development of "precision agriculture" research and practice, innovative research using high-tech to enhance agricultural science and technology has entered a new era. With the intertwined development of electronic automation, computer network technology, and agriculture, modern smart agriculture, characterized by "precision, low-energy consumption, safety, and high yield," has gradually become a research hotspot.

[0003] Currently, in most greenhouse systems, environmental gas data is primarily monitored and recorded manually, a method that is highly arbitrary and uncertain. Although some intelligent greenhouse systems can use electrochemical sensors to detect the concentrations of gases such as O2 and CO2, providing data support for environmental control, the low gas flow in greenhouse systems can easily lead to localized over- or under-concentrations, and the limited detection range can result in errors in the detection data.

[0004] However, when using specific circulating ventilation gas sampling, it is easy to introduce external pollutants, affecting the plant growth environment, while also consuming high energy and having high maintenance costs.

[0005] Therefore, it is necessary to provide a gas sampling device for an intelligent greenhouse monitoring system to solve the problems raised in the above background technology. Summary of the Invention

[0006] To achieve the above objectives, the present invention provides the following technical solution: a gas sampling device for an intelligent greenhouse monitoring system, comprising:

[0007] The outer frame, the side of which is assembled by the greenhouse side panels, is symmetrically mounted with half-open doors;

[0008] An inner bottom plate is horizontally suspended inside the outer frame;

[0009] Gas collection units are distributed on the inner walls of the side panels of the outer frame;

[0010] The breathing air supply unit is installed in the middle of the inner bottom plate, and the breathing air supply unit is connected with each of the air collection units.

[0011] Furthermore, preferably, the breathing air supply unit comprises:

[0012] An airflow disk is fixed to the lower end surface of the inner bottom plate, and a plurality of airflow tubes are connected to the circumferential side wall of the airflow disk, and each of the airflow tubes is connected to a corresponding air collection unit;

[0013] A cylinder seat is fixed above the airflow disk, and a vortex chamber is fixed in the cylinder seat;

[0014] An air guide ring is coaxially rotatably connected in the vortex chamber, and the lower end of the air guide ring is connected to the air flow disk;

[0015] An upper sleeve is fixed above the cylinder seat, and an air pumping bag is provided in the upper sleeve;

[0016] An air supply pipe is vertically slidably connected in the upper sleeve, the lower end of the air supply pipe is slidably connected to the vortex chamber, and the upper end of the air supply pipe is connected to the air pump;

[0017] The central shaft is vertically slidably connected in the air pumping bag, and the lower end of the central shaft is fixed to the air supply pipe.

[0018] Furthermore, as a preference, an air intake cavity and an exhaust cavity are provided in the air flow disk, and an air intake channel and an exhaust channel are provided in the air supply pipe, a connecting pipe is fixed below the exhaust channel, and the connecting pipe is sealingly and slidingly connected to the exhaust cavity of the air flow disk;

[0019] The air intake channel is connected to the air guide ring;

[0020] An axial pressure plate is slidably mounted on the upper end of the upper sleeve, the central shaft is fixed to the axial pressure plate, and a gas collection hole is opened in the axial pressure plate.

[0021] Further, as a preference, a lifting rod is rotatably connected to one side of the upper end surface of the upper sleeve, one end of the lifting rod abuts against the shaft pressure plate, and a propulsion system is vertically connected to the side wall of the upper sleeve, and the output end of the propulsion system is hinged to the other end of the lifting rod;

[0022] An inner spring is sleeved on the shaft pressure plate, and one end of the inner spring is connected to the upper sleeve.

[0023] Furthermore, as a preference, the vortex chamber is horizontally connected to an external pipe, and a plurality of strip-shaped holes are evenly distributed on the inner wall of the vortex chamber;

[0024] A flow control ring is fixed in the center of the vortex chamber, and the flow control ring is sleeved outside the air guide ring. An annular chamber is provided inside the flow control ring, and a plurality of flow diffusion channels are distributed on the outer wall of the flow control ring, and the flow diffusion channels are connected to the annular chamber;

[0025] The inner side wall of the flow control ring is circumferentially distributed with multiple groups of through holes, and the air guide ring is circumferentially distributed with multiple direct current holes.

[0026] Furthermore, as a preference, each group of through holes is composed of a plurality of micro-holes arranged and distributed at equal intervals, and the micro-holes in each group of through holes are arranged equidistantly along the circumferential direction of the flow control ring;

[0027] The air guide ring is connected to different numbers of micro-holes during rotation adjustment;

[0028] A driving part is fixed in the cylinder seat, and the driving part is connected with the air guide ring through a transmission gear chain for transmission.

[0029] Furthermore, as a preference, the air intake channel and the exhaust channel are configured as one-way channel structures, the exhaust cavity in the air flow disk is located inside the air intake cavity, and a plurality of inner flow channels are distributed outside the exhaust cavity, and an outer flow channel is provided outside each inner flow channel in the air flow disk, and the outer flow channel is connected to the air intake cavity.

[0030] Furthermore, preferably, the gas extraction unit includes:

[0031] A manifold frame is transversely fixed to the lower end surface of the inner bottom plate, and one end of the airflow pipe is connected to the manifold frame;

[0032] There are multiple pipe groups arranged and distributed, each of which is vertically fixed to the greenhouse side panels of the outer frame, and each of which is provided with two air ducts;

[0033] The air hole channels are evenly arranged and distributed on the pipeline group. The air hole channels are each provided with an air nozzle. The side walls of the air nozzles are provided with side through holes. Both of the air channels are sealed and connected to the air nozzles through the side through holes.

[0034] A valve sleeve is fixed in the air spray head, and two valve holes are formed on the side wall of the valve sleeve;

[0035] The air inlet passage and the exhaust passage are symmetrically distributed in the air nozzle, and the air inlet passage and the exhaust passage are respectively connected to the valve holes on the valve sleeve.

[0036] Furthermore, preferably, the valve holes are distributed front and back along the axial direction of the valve sleeve, a valve plug is slidably connected in the valve sleeve, and the valve plug is in sealing contact with the inner wall of the valve sleeve;

[0037] A core hole is provided in the valve plug, and a core rod is fixed in the air spray head, and the core rod is slidably assembled with the core hole; an electromagnetic controller is provided in the air spray head.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] In the present invention, a gas sampling unit is arranged in the intelligent greenhouse monitoring system. The gas sampling unit extracts and samples the gas in the intelligent greenhouse monitoring system through evenly distributed pore channels to avoid sample deviation caused by local gas sampling. The main breathing and air supply unit can effectively promote the circulation and exchange of gases such as CO2 and O2 in the greenhouse system by rhythmically inhaling and exhausting air, ensuring the uniformity and stability of the gas environment in the greenhouse, thereby providing more stable and accurate detection results in the subsequent gas sampling process; and it can also adjust the breathing and air supply rhythm according to the growth conditions of different plants in the greenhouse system, so as to adopt appropriate breathing and air supply methods at different growth stages, which is convenient for subsequent auxiliary adjustment of the culture environment in the greenhouse system. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0041] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0042] Figure 3 Schematic diagram of the structure of the breathing air supply unit in the present invention;

[0043] Figure 4 is a cross-sectional view of the breathing air supply unit of the present invention;

[0044] Figure 5 for Figure 4 A schematic diagram of the structure at center A;

[0045] Figure 6 Schematic diagram of the half-section structure of the flow control ring in the present invention;

[0046] Figure 7 It is a cross-sectional view of the structure of the airflow disk in the present invention;

[0047] Figure 8 Schematic diagram of the structure of the gas nozzle in the present invention;

[0048] In the figure: 1. outer frame; 11. greenhouse side panel; 12. half-open door; 13. inner bottom plate; 2. air collection unit; 21. manifold rack; 22. pipe group; 23. air hole channel; 24. airway; 3. breathing air supply unit; 31. air flow tube; 32. cylinder seat; 33. upper sleeve; 34. air extraction bag; 35. air supply pipe; 351. air inlet channel; 352. exhaust channel; 36. central axis; 37. connecting pipe; 38. shaft pressure plate; 39. air collection hole; 310. top Lifting rod; 311, propulsion system; 4, air flow disk; 41, exhaust chamber; 42, intake chamber; 43, inner flow channel; 44, outer flow channel; 5, vortex chamber; 51, air guide ring; 52, external pipe; 53, strip hole; 54, flow control ring; 55, annular chamber; 56, flow channel; 57, through hole; 58, drive unit; 59, direct current hole; 6, air nozzle; 61, valve sleeve; 62, valve hole; 63, intake duct; 64, exhaust duct; 65, valve plug; 66, core rod. DETAILED DESCRIPTION

[0049] See also Figures 1-8 In an embodiment of the present invention, a gas sampling device of an intelligent greenhouse monitoring system includes:

[0050] An outer frame 1 is assembled with greenhouse side panels 11 on its sides, and a half-open door 12 is symmetrically mounted on the outer frame 1. The intelligent greenhouse monitoring system uses an ESP32 development board as the main control circuit. After the temperature, humidity, light intensity and other signals in the greenhouse are transmitted through sensors, they are digitized and transmitted to the ESP32 main control circuit. The main control circuit analyzes the monitored data and changes the on / off state of the digital IO port based on the analyzed data, thereby controlling the back-end heater, fan, fogger, and UV lamp on and off to achieve the purpose of regulating environmental parameters.

[0051] The inner bottom plate 13 is horizontally suspended inside the outer frame 1;

[0052] The air collection units 2 are distributed on the inner walls of the side panels of the outer frame 1; the air collection units 2 can cover the entire spatial range of the greenhouse system;

[0053] The breathing air supply unit 3 is installed in the middle of the inner bottom plate 13. The breathing air supply unit 3 is connected to each of the gas collection units 2. The breathing air supply unit 3 can provide the gas collection units 2 with air extraction circulation power. The breathing air supply unit 3 can use the breathing method to continuously circulate the gas inside the greenhouse system. On the one hand, it can ensure that the gases in different areas of the greenhouse are fully mixed by rhythmically inhaling and expelling air. This can avoid local sampling deviations, so that the collected gas samples can better represent the gas environment of the entire greenhouse. On the other hand, it can simulate the respiration of plants, that is, the flow of gases such as CO2 and O2 between plants and the surrounding air, to maintain a dynamic balance between the gas collection system and the greenhouse environment. It can also dynamically adjust the sampling position and frequency according to the actual situation in the greenhouse (such as plant distribution, ventilation conditions, etc.) to further improve the representativeness of the samples. Compared with the traditional fixed-point sampling method, the breathing air supply unit 3 can reduce these interference factors by continuously circulating gas, thereby providing more stable and accurate detection results.

[0054] It should be noted that the hardware of the overall intelligent greenhouse monitoring system also includes three major parts: detectors, controllers, and actuators;

[0055] The detector is mainly responsible for detecting the environmental parameters of the system and sending the detected data to the controller. It is mainly composed of temperature and humidity sensors and light intensity sensors; including temperature and humidity sensors, temperature and humidity sensors, and light intensity sensors;

[0056] The controller is mainly composed of a power conversion module, an ESP32 main control circuit board, and a relay module. It is responsible for voltage regulation, data transmission and control, power amplification, and other functions of the entire system.

[0057] The actuator is mainly responsible for implementing the operations given by the control unit and consists of a heating rod, a fan, a fogger and an ultraviolet lamp.

[0058] In this embodiment, the breathing air supply unit 3 includes:

[0059] The air flow disk 4 is fixed to the lower end surface of the inner bottom plate 13. The circumferential side wall of the air flow disk 4 is connected to a plurality of air flow tubes 31. Each of the air flow tubes 31 is connected to a corresponding air collection unit 2.

[0060] The cylinder seat 32 is fixed above the airflow disk 4, and the vortex chamber 5 is fixed in the cylinder seat 32;

[0061] An air guide ring 51 is coaxially rotatably connected to the vortex chamber 5 , and the lower end of the air guide ring 51 is connected to the air flow disk 4 ;

[0062] The upper sleeve 33 is fixed on the top of the cylinder seat 32, and the upper sleeve 33 is provided with an air pump 34;

[0063] The air supply pipe 35 is vertically slidably connected to the upper sleeve 33. The lower end of the air supply pipe 35 is slidably connected to the vortex chamber 5, and the upper end of the air supply pipe 35 is connected to the air extraction bag 34. When the air extraction bag 34 is squeezed and expanded, it can transport the gas in the greenhouse system to the air flow disk 4 through each air collection unit 2. The gas in the air flow disk 4 is concentrated and flows into the air extraction bag 34 through the air supply pipe 35.

[0064] The central shaft 36 is vertically slidably connected in the air pumping bag 34 , and its lower end is fixed to the air supply pipe 35 .

[0065] As a preferred embodiment, the air flow disk 4 is provided with an exhaust cavity 41 and an air intake cavity 42, and the air supply pipe 35 is provided with an air intake channel 351 and an exhaust channel 352. A connecting pipe 37 is fixed below the exhaust channel 352, and the connecting pipe 37 is sealed and slidably connected to the exhaust cavity 41 of the air flow disk 4.

[0066] The air inlet channel 351 is connected to the air guide ring 51;

[0067] The upper end of the upper sleeve 33 is slidably mounted with an axial pressure plate 38, the central shaft 36 is fixed to the axial pressure plate 38, and an air collection hole 39 is opened in the axial pressure plate 38; in normal operation, the axial pressure plate 38 drives the air supply pipe 35 to slide up and down through the central shaft 36 during the up and down sliding. At this time, the air pumping bag 34 in the upper sleeve 33 expands and contracts, so that the gas in the greenhouse system can be transported to the air pumping bag 34 through the air inlet channel 351 in the air supply pipe 35. The gas entering the air pumping bag 34 can be circulated and discharged again through the exhaust channel 352 to achieve a breathing exhaust effect, simulating the natural gas exchange process between plants and the environment. In order to maintain the dynamic balance of the environmental gases in the greenhouse system, on the one hand, it helps maintain the stability of the gas composition in the greenhouse, ensuring that the plants obtain sufficient CO2 for photosynthesis, while discharging excess O2 and harmful gases. On the other hand, it can ventilate according to actual needs, such as adjusting the breathing and air supply rhythm according to the growth conditions of different plants in the greenhouse system, so that appropriate breathing and air supply methods can be used in different growth stages to ensure the healthy growth of plants; and during gas sampling and detection, the shaft pressure plate 38 slides downward to expand the air bag 34. At this time, the gas in the air bag 34 can be sampled through the air sampling hole 39 to ensure sampling accuracy.

[0068] In this embodiment, a lifting rod 310 is rotatably connected to one side of the upper end surface of the upper sleeve 33. One end of the lifting rod 310 abuts against the shaft pressure plate 38. A propulsion system 311 is vertically connected to the side wall of the upper sleeve 33. The output end of the propulsion system 311 is hinged to the other end of the lifting rod 310.

[0069] An inner spring (not shown in the figure) is provided on the axial pressure plate 38 , one end of which is connected to the upper sleeve 33 . The inner spring acts on the axial pressure plate 38 to slide toward the upper sleeve 33 under the action of elastic force.

[0070] In this embodiment, an external pipe 52 is horizontally connected to the outside of the vortex chamber 5, and a plurality of strip-shaped holes 53 are evenly distributed on the inner wall of the vortex chamber 5; the external pipe 52 can transport external CO2 or fresh air into the vortex chamber 5, and then mix with the gas in the air guide ring 51 through the strip-shaped holes 53;

[0071] A flow control ring 54 is fixed in the center of the vortex chamber 5. The flow control ring 54 is sleeved outside the air guide ring 51. An annular chamber 55 is provided inside the flow control ring 54. A plurality of diffusion channels 56 are distributed on the outer wall of the flow control ring 54. The diffusion channels 56 are connected to the annular chamber 55. External CO2 or fresh air can flow evenly into the annular chamber 55 through the diffusion channels 56.

[0072] The inner wall of the flow control ring 54 has a plurality of through holes 57 distributed circumferentially, and the air guide ring 51 has a plurality of direct current holes 59 distributed circumferentially.

[0073] In this embodiment, each group of through holes 57 is composed of a plurality of micro-holes arranged at equal intervals, and the micro-holes in each group of through holes 57 are arranged equidistantly along the circumference of the flow control ring;

[0074] The air guide ring 51 is connected to different numbers of micro-holes during rotation adjustment, thereby effectively controlling the amount of external CO2 or fresh air supplied, thereby adjusting the CO2 gas concentration in the greenhouse system, promoting photosynthesis, increasing the growth rate of plants, and ensuring the oxygen content and air quality in the greenhouse. During gas sampling, the direct current holes 59 on the air guide ring 51 need to be staggered with the through holes 57 to prevent the introduction of external gas and the reduction of sampling accuracy.

[0075] A driving portion 58 is fixed in the cartridge seat 32 , and the driving portion 58 is connected to the air guide ring 51 through a transmission gear chain.

[0076] As a preferred embodiment, the air intake channel 351 and the exhaust channel 352 are configured as a one-way channel structure, the exhaust cavity 41 in the air flow disk 4 is located inside the air intake cavity 42, and a plurality of inner flow channels 43 are distributed outside the exhaust cavity 41, and an outer flow channel 44 is provided outside each inner flow channel 43 in the air flow disk 4, and the outer flow channel 44 is connected to the air intake cavity 42.

[0077] In this embodiment, the gas extraction unit 2 includes:

[0078] The manifold frame 21 is transversely fixed to the lower end surface of the inner bottom plate 13. One end of the airflow pipe 31 is connected to the manifold frame 21. It should be noted that both the manifold frame 21 and the airflow pipe 31 adopt a double-layer pipe structure, thereby forming an intake duct and an exhaust duct.

[0079] There are multiple pipe groups 22 arranged and distributed. Each pipe group 22 is vertically fixed to the greenhouse side plate 11 of the outer frame 1. Each pipe group 22 is provided with two air ducts 24. The two air ducts 24 are respectively connected to the air inlet and exhaust ducts of the manifold frame 21.

[0080] The air pore channels 23 are evenly arranged and distributed on the pipe group 22. The air pore channels 23 are each provided with an air nozzle 6. The side walls of the air nozzle 6 are provided with side through holes. The two air channels 24 are sealed and connected to the air nozzle 6 through the side through holes.

[0081] A valve sleeve 61 is fixed in the air spray head 6, and two valve holes 62 are formed on the side wall of the valve sleeve 61;

[0082] The air inlet channel 63 and the exhaust channel 64 are symmetrically distributed in the air nozzle 6. The air inlet channel 63 and the exhaust channel 64 are respectively connected to the valve hole 62 on the valve sleeve 61. That is to say, when the air bag 34 is expanded and exhausted, it can pump the gas in the greenhouse system through the air inlet channel 63 in the air nozzle 6, and when the air bag 34 is compressed and exhausted, it can transport the gas to the greenhouse system through the exhaust channel 64.

[0083] In this embodiment, the valve holes 62 are distributed front and back along the axis of the valve sleeve 61. A valve plug 65 is slidably connected to the valve sleeve 61. The valve plug 65 is in sealing contact with the inner wall of the valve sleeve 61.

[0084] A core hole is provided in the valve plug 65, and a core rod 66 is fixed in the gas nozzle 6, and the core rod 66 is slidably assembled with the core hole; an electromagnetic controller is provided in the gas nozzle 6, and the electromagnetic controller is used to drive the valve plug 65 to slide and adjust, so that the valve plug 65 seals and blocks one of the valve holes 62 on the valve sleeve 61, thereby allowing the air inlet channel 63 or the exhaust channel 64 in the gas nozzle 6 to be opened separately. Therefore, during use, the specific distribution of the air inlet point and the exhaust point in the gas collection unit 2 can be adjusted according to factors such as the type and growth conditions of the plants being planted, so that the gas in the greenhouse can be flexibly circulated during the breathing-like pumping, thereby maintaining the gas stability in the greenhouse system.

[0085] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A gas sampling device for an intelligent greenhouse monitoring system, characterized in that: It includes: An outer frame (1) is assembled with greenhouse side panels (11) on its sides; An inner bottom plate (13) is horizontally suspended inside the outer frame (1); Gas collection units (2) are distributed on the inner walls of each side plate of the outer frame (1); A breathing air supply unit (3) is installed in the middle of the inner bottom plate (13), and the breathing air supply unit (3) is connected to each of the air collection units (2); The breathing air supply unit (3) comprises: An airflow disk (4) is fixed to the lower end surface of the inner bottom plate (13), and a plurality of airflow tubes (31) are connected to the circumferential side wall of the airflow disk (4), and each of the airflow tubes (31) is connected to a corresponding air collection unit (2); A cartridge seat (32) is fixed above the airflow disk (4), and a vortex chamber (5) is fixed in the cartridge seat (32); An air guide ring (51) is coaxially rotatably connected in the vortex chamber (5), and the lower end of the air guide ring (51) is connected to the air flow disk (4); An upper sleeve (33) is fixed above the cylinder seat (32), and an air pumping bag (34) is provided in the upper sleeve (33); An air supply pipe (35) is vertically slidably connected in the upper sleeve (33), the lower end of the air supply pipe (35) is slidably connected to the vortex chamber (5), and the upper end of the air supply pipe (35) is connected to the air pumping bag (34); The central shaft (36) is vertically slidably connected in the air pumping bag (34), and its lower end is fixed to the air supply pipe (35).

2. The gas sampling device of the intelligent greenhouse monitoring system according to claim 1, characterized in that: An exhaust cavity (41) and an intake cavity (42) are provided in the air flow disk (4), and an intake channel (351) and an exhaust channel (352) are provided in the air supply pipe (35). A connecting pipe (37) is fixed below the exhaust channel (352), and the connecting pipe (37) is sealingly and slidably connected to the exhaust cavity (41) of the air flow disk (4); The air inlet channel (351) is in communication with the air guide ring (51); An axial pressure plate (38) is slidably mounted on the upper end of the upper sleeve (33), the central shaft (36) is fixed to the axial pressure plate (38), and a gas collection hole (39) is provided in the axial pressure plate (38).

3. The gas sampling device of the intelligent greenhouse monitoring system according to claim 2, characterized in that: A lifting rod (310) is rotatably connected to one side of the upper end surface of the upper sleeve (33), one end of the lifting rod (310) abuts against the shaft pressure plate (38), and a propulsion system (311) is vertically connected to the side wall of the upper sleeve (33), and the output end of the propulsion system (311) is hinged to the other end of the lifting rod (310); An inner spring is sleeved on the shaft pressure plate (38), and one end of the inner spring is connected to the upper sleeve (33).

4. The gas sampling device of the intelligent greenhouse monitoring system according to claim 2, characterized in that: The vortex chamber (5) is horizontally connected to an external pipe (52), and a plurality of strip-shaped holes (53) are evenly distributed on the inner wall of the vortex chamber (5); A flow control ring (54) is fixed in the center of the vortex chamber (5), the flow control ring (54) is sleeved outside the air guide ring (51), an annular chamber (55) is provided inside the flow control ring (54), and a plurality of diffuse flow channels (56) are distributed on the outer wall of the flow control ring (54), and the diffuse flow channels (56) are communicated with the annular chamber (55); The inner side wall of the flow control ring (54) has a plurality of groups of through holes (57) distributed circumferentially, and the air guide ring (51) has a plurality of direct current holes (59) distributed circumferentially.

5. The gas sampling device of the intelligent greenhouse monitoring system according to claim 4, characterized in that: Each group of through holes (57) is composed of a plurality of micro-holes arranged and distributed at equal intervals, and the micro-holes in each group of through holes (57) are arranged equidistantly along the circumferential direction of the flow control ring; The air guide ring (51) is connected to different numbers of micropores during rotation adjustment; A driving part (58) is fixed in the cylinder seat (32), and the driving part (58) is connected to the air guide ring (51) for transmission via a transmission tooth chain.

6. The gas sampling device of the intelligent greenhouse monitoring system according to claim 2, characterized in that: The air inlet channel (351) and the air outlet channel (352) are configured as one-way channel structures. The air outlet cavity (41) in the air flow disk (4) is located inside the air inlet cavity (42), and a plurality of inner flow channels (43) are distributed outside the air outlet cavity (41). An outer flow channel (44) is provided outside each inner flow channel (43) in the air flow disk (4), and the outer flow channel (44) is connected to the air inlet cavity (42).

7. The gas sampling device of the intelligent greenhouse monitoring system according to claim 1, characterized in that: The gas collection unit (2) comprises: A manifold frame (21) is transversely fixed to the lower end surface of the inner bottom plate (13), and one end of the airflow pipe (31) is connected to the manifold frame (21); A plurality of pipe groups (22) are arranged and distributed, each pipe group (22) is vertically fixed on the greenhouse side plate (11) of the outer frame (1), and each pipe group (22) is provided with two air ducts (24); The air hole channels (23) are evenly arranged and distributed on the pipeline group (22), and the air hole channels (23) are each provided with an air nozzle (6). The side wall of the air nozzle (6) is provided with a side through hole, and the two air channels (24) are both sealed and connected to the air nozzle (6) through the side through hole; A valve sleeve (61) is fixed in the air spray head (6), and two valve holes (62) are formed on the side wall of the valve sleeve (61); The air inlet duct (63) and the air exhaust duct (64) are symmetrically distributed in the air nozzle (6), and the air inlet duct (63) and the air exhaust duct (64) are respectively connected to the valve holes (62) on the valve sleeve (61).

8. The gas sampling device of the intelligent greenhouse monitoring system according to claim 7, characterized in that: The valve holes (62) are distributed front and back along the axial direction of the valve sleeve (61), a valve plug (65) is slidably connected in the valve sleeve (61), and the valve plug (65) is in sealing contact with the inner wall of the valve sleeve (61); A core hole is provided in the valve plug (65), and a core rod (66) is fixed in the air spray head (6), and the core rod (66) is slidably assembled with the core hole; an electromagnetic controller is provided in the air spray head (6).

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