Gas sampling device of intelligent greenhouse monitoring system

Abstract

The invention discloses a gas sampling device of an intelligent greenhouse monitoring system, which comprises: an outer frame, the side wall of which is assembled by a greenhouse side plate combination, and the outer frame is symmetrically provided with half doors; the inner bottom plate is horizontally arranged in the outer frame in an overhead manner; the gas production units are distributed on the inner walls of the side plates of the outer frame; the breathing air supply unit is mounted in the middle of the inner bottom plate, and the breathing air supply unit is communicated with all the air collection units; the breathing air supply unit mainly arranged in the greenhouse system can rhythmically inhale and exhaust air, circulation and exchange of gases such as COs and Os in the greenhouse system are effectively promoted, the uniformity and stability of the gas environment in the greenhouse are ensured, and therefore a more stable and accurate detection result is provided in the subsequent gas sampling process.

Description

Technical Field

[0001] The 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] At present, in most greenhouse systems, environmental gas data is mainly monitored and recorded manually, which is very random and uncertain. Although some smart greenhouse systems can use electrochemical sensors to detect O 2 , CO 2 The concentration of gases such as chlorine and chlorine can be measured to provide data support for environmental control. However, due to the small gas flow in the greenhouse system, it is easy for the local gas concentration to be too high or too low, and its detection range is limited, resulting in errors in the detection data.

[0003] 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.

[0004] 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

[0005] To achieve the above object, the present invention provides the following technical solution: a gas sampling device for an intelligent greenhouse monitoring system, comprising:

[0006] The outer frame, whose side enclosure is assembled by greenhouse side panels, is symmetrically mounted with half-open doors on the outer frame;

[0007] An inner bottom plate is horizontally suspended inside the outer frame;

[0008] Gas collection units are distributed on the inner walls of the side panels of the outer frame;

[0009] A 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.

[0010] Further, preferably, the breathing air supply unit comprises:

[0011] An airflow disk is fixed on 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;

[0012] A cylinder seat is fixed above the airflow disk, and a vortex chamber is fixed in the cylinder seat;

[0013] 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;

[0014] An upper sleeve is fixed above the cylinder seat, and an air pumping bag is arranged inside the upper sleeve;

[0015] 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 pumping bag;

[0016] The central axis is vertically slidably connected in the air pumping bag, and its lower end is fixed to the air supply pipe.

[0017] Further, 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 slidably connected to the exhaust cavity of the air flow disk;

[0018] The air inlet passage is connected to the air guide ring;

[0019] 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.

[0020] 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;

[0021] An inner spring is sleeved on the shaft pressure plate, and one end of the inner spring is connected to the upper sleeve.

[0022] Further, as a preference, an external pipe is horizontally connected to the outside of the vortex chamber, and a plurality of strip holes are evenly distributed on the inner wall of the vortex chamber;

[0023] A flow control ring is fixed in the center of the vortex chamber, the flow control ring is sleeved outside the air guide ring, an annular chamber is arranged inside the flow control ring, and a plurality of diffuse flow channels are distributed on the outer wall of the flow control ring, the diffuse flow channels are connected with the annular chamber;

[0024] The inner side wall of the flow control ring is circumferentially distributed with a plurality of through holes, and the air guide ring is circumferentially distributed with a plurality of direct current holes.

[0025] Further, 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;

[0026] The air guide ring is connected with different numbers of micro-holes during rotation adjustment;

[0027] A driving part is fixed in the cylinder seat, and the driving part is connected with the air guide ring for transmission through a transmission tooth chain.

[0028] Further, as a preference, the air intake channel and the exhaust channel are configured as a one-way channel structure, 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.

[0029] Further, preferably, the gas collection unit comprises:

[0030] A flow distribution pipe rack is transversely fixed to the lower end surface of the inner bottom plate, and one end of the air flow pipe is connected to the flow distribution pipe rack;

[0031] There are multiple pipeline groups arranged and distributed, each of which is vertically fixed on the greenhouse side plate of the outer frame, and each of which is provided with two air passages;

[0032] The air hole channels are evenly arranged and distributed on the pipeline group, and the air hole channels are each provided with an air nozzle, and the side wall of the air nozzle is provided with a side through hole, and the two air channels are sealed and connected with the air nozzle through the side through hole;

[0033] A valve sleeve is fixed in the air spray head, and two valve holes are formed on the side wall of the valve sleeve;

[0034] The air inlet fine channel and the air exhaust fine channel are symmetrically distributed in the air nozzle, and the air inlet fine channel and the air exhaust fine channel are respectively connected with the valve holes on the valve sleeve correspondingly.

[0035] Further, as a preference, 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;

[0036] A core hole is arranged 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 arranged in the air spray head.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] 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 breathing air supply unit is mainly arranged to effectively promote CO2 in the greenhouse system by rhythmically inhaling and exhausting air. 2 , O 2 The circulation and exchange of gases ensures the uniformity and stability of the gas environment in the greenhouse, thereby providing more stable and accurate test 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 cultivation environment in the greenhouse system. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0040] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0041] Figure 3 It is a structural schematic diagram of the breathing air supply unit in the present invention;

[0042] Figure 4 is a cross-sectional view of the breathing air supply unit of the present invention;

[0043] Figure 5 for Figure 4 A schematic diagram of the structure enlargement in the middle;

[0044] Figure 6 It is a schematic diagram of the half-section structure of the flow control ring in the present invention;

[0045] Figure 7 It is a structural cross-sectional view of the airflow disk in the present invention;

[0046] Figure 8 It is a schematic diagram of the structure of the gas nozzle in the present invention;

[0047] In the figure: 1, outer frame; 11, greenhouse side panel; 12, half-open door; 13, inner bottom plate; 2, air collection unit; 21, shunt pipe rack; 22, pipeline group; 23, air hole channel; 24, airway; 3, breathing air supply unit; 31, air flow pipe; 32, cylinder seat; 33, upper sleeve; 34, air extraction bag; 35, air supply pipe; 351, air intake 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, air inlet chamber; 42, exhaust 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, air inlet channel; 64, exhaust channel; 65, valve plug; 66, core rod. DETAILED DESCRIPTION

[0048] See also Figure 1-Figure 8 In an embodiment of the present invention, a gas sampling device of an intelligent greenhouse monitoring system includes:

[0049] The outer frame 1 is assembled with greenhouse side panels 11 on its side, and a half-open door 12 is symmetrically installed on the outer frame 1; the ESP32 development board is used as the main control circuit in the intelligent greenhouse monitoring system, and the temperature, humidity, light intensity and other signals in the greenhouse are transmitted to the ESP32 main control circuit after being digitized by the sensor, and the main control circuit analyzes the monitored data and changes the switch state of the digital IO port according to the analyzed data, thereby controlling the switch of the rear-end heater, fan, fogger, and ultraviolet lamp to achieve the purpose of regulating environmental parameters;

[0050] An inner bottom plate 13 is horizontally suspended inside the outer frame 1;

[0051] 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 space range of the greenhouse system;

[0052] 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 air collection units 2. The breathing air supply unit 3 can provide the air collection unit 2 with a pumping cycle power. The breathing air supply unit 3 can use the breathing method to continuously transport and circulate the gas inside the greenhouse system. On the one hand, it can ensure that the gas in different areas of the greenhouse can be fully mixed by rhythmically inhaling and exhaling 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 through ventilation, that is, the CO between plants and the surrounding air. 2 , O 2 The inflow and outflow of gases can maintain the dynamic balance between the gas collection system and the greenhouse environment; and the sampling position and frequency can be dynamically adjusted according to the actual situation in the greenhouse (such as plant distribution, ventilation conditions, etc.), further improving 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;

[0053] It should be noted that the hardware of the overall system of the intelligent greenhouse monitoring system also includes three major parts: detector, controller, and actuator;

[0054] 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;

[0055] The controller is mainly composed of a power conversion module, an ESP32 main control circuit board, and a relay module, and is responsible for voltage conditioning, data transmission and control, power amplification, and other functions of the overall system;

[0056] The actuator is mainly responsible for implementing the operations given by the control unit and is composed of a heating rod, a fan, a fogger and an ultraviolet lamp.

[0057] In this embodiment, the breathing air supply unit 3 includes:

[0058] The airflow disk 4 is fixed on 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;

[0059] The cartridge seat 32 is fixed above the airflow disk 4, and a vortex chamber 5 is fixed in the cartridge seat 32;

[0060] 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;

[0061] An upper sleeve 33 is fixed on the top of the cylinder seat 32, and an air pumping bag 34 is arranged in the upper sleeve 33;

[0062] The 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; wherein, when the air pumping 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, and the gas in the air flow disk 4 is concentrated and flows into the air pumping bag 34 through the air supply pipe 35;

[0063] 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 .

[0064] As a preferred embodiment, the air flow disk 4 is provided with an air intake cavity 41 and an air exhaust cavity 42, and the air supply pipe 35 is provided with an air intake channel 351 and an air exhaust channel 352, and a connecting pipe 37 is fixed below the air exhaust channel 352, and the connecting pipe 37 is sealingly and slidably connected to the air exhaust cavity 42 of the air flow disk 4;

[0065] The air inlet passage 351 is connected to the air guide ring 51;

[0066] An axial pressure plate 38 is slidably mounted on the upper end of the upper sleeve 33, and the central shaft 36 is fixed to the axial pressure plate 38. 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 suction bag 34 in the upper sleeve 33 expands and contracts, so that the gas in the greenhouse system can be transported to the air suction bag 34 through the air inlet channel 351 in the air supply pipe 35. The gas entering the air suction 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, so as to maintain the dynamic balance of environmental gases in the greenhouse system. On the one hand, it helps to maintain the stability of the gas composition in the greenhouse and ensure that the plants obtain sufficient CO 2 Used for photosynthesis, while removing excess O 2 and harmful gases, and 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 breathing and air supply in an appropriate manner can be adopted at different growth stages to ensure the healthy growth of plants; and during gas sampling and detection, the axial 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 the sampling accuracy.

[0067] 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, 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;

[0068] An inner spring (not shown in the figure) is sleeved on the shaft pressure plate 38 , and one end of the inner spring is connected to the upper sleeve 33 . The inner spring acts on the shaft pressure plate 38 to slide in a direction close to the upper sleeve 33 under the elastic force.

[0069] In this embodiment, the vortex chamber 5 is horizontally connected to an external pipe 52, and a plurality of strip holes 53 are evenly distributed on the inner wall of the vortex chamber 5; the external pipe 52 can be used to transfer the external CO 2 Or fresh air is delivered to the vortex chamber 5, and then mixed with the gas in the air guide ring 51 through the strip holes 53;

[0070] 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 arranged inside the flow control ring 54. A plurality of diffuser channels 56 are distributed on the outer wall of the flow control ring 54. The diffuser channels 56 are connected to the annular chamber 55. 2 Or fresh air can flow evenly into the annular chamber 55 through the diffuser channel 56;

[0071] 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.

[0072] In this embodiment, 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;

[0073] The air guide ring 51 is connected to different numbers of micro-holes during rotation adjustment, thereby effectively controlling the external CO 2 Or the amount of fresh air supplied to regulate the CO 2 Gas concentration, promote photosynthesis, increase the growth rate of plants, and ensure the oxygen content and air quality in the greenhouse; wherein, when sampling gas, the direct current hole 59 on the gas guide ring 51 needs to be staggered with the through hole 57 to avoid the introduction of external gas causing a decrease in sampling accuracy;

[0074] A driving part 58 is fixed inside the cartridge seat 32 , and the driving part 58 is connected to the air guide ring 51 for transmission via a transmission tooth chain.

[0075] 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.

[0076] In this embodiment, the gas collection unit 2 includes:

[0077] The flow distribution pipe frame 21 is transversely fixed to the lower end surface of the inner bottom plate 13, and one end of the air flow pipe 31 is connected to the flow distribution pipe frame 21; it should be noted that the flow distribution pipe frame 21 and the air flow pipe 31 both adopt a double-layer pipe body structure, thereby forming an air intake duct and an exhaust duct;

[0078] There are multiple pipe groups 22 arranged and distributed, each of which is vertically fixed on the greenhouse side plate 11 of the outer frame 1, and each of which is provided with two air passages 24; the two air passages 24 are respectively connected with the air inlet and the exhaust passage of the manifold frame 21;

[0079] The air hole channels 23 are evenly arranged and distributed on the pipeline group 22. 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. The two air channels 24 are both sealed and connected with the air nozzle 6 through the side through hole.

[0080] 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;

[0081] The air inlet channel 63 and the exhaust channel 64 are symmetrically distributed in the air nozzle 6, and 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 vacuum 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 vacuum bag 34 is compressed and exhausted, it can transport the gas to the greenhouse system through the exhaust channel 64.

[0082] In this embodiment, the valve holes 62 are distributed front and back along the axial direction of the valve sleeve 61, and 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;

[0083] 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, so that the air inlet channel 63 or the exhaust channel 64 in the gas nozzle 6 is 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 to be planted, so that the gas in the greenhouse can be flexibly circulated during the breathing-type pumping, thereby maintaining the gas stability in the greenhouse system.

[0084] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A gas sampling device for an intelligent greenhouse monitoring system, characterized in that: It includes: The outer frame (1) is assembled with greenhouse side panels (11) used for its side enclosure; An inner bottom plate (13) is horizontally suspended inside the outer frame (1); Gas collection units (2) are distributed on the inner walls of the side panels 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).

2. The gas sampling device of the intelligent greenhouse monitoring system according to claim 1 is characterized in that: The breathing air supply unit (3) comprises: An airflow disk (4) is fixed to the lower end surface of the inner bottom plate (13), 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 inside 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 arranged inside 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 extraction 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).

3. The gas sampling device of the intelligent greenhouse monitoring system according to claim 2 is characterized in that: An air intake cavity (41) and an air exhaust cavity (42) are provided in the air flow disk (4), and an air intake passage (351) and an air exhaust passage (352) are provided in the air supply pipe (35). A connecting pipe (37) is fixed below the air exhaust passage (352), and the connecting pipe (37) is sealingly and slidably connected to the air exhaust cavity (42) of the air flow disk (4); The air intake passage (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).

4. The gas sampling device of the intelligent greenhouse monitoring system according to claim 3 is 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).

5. The gas sampling device of the intelligent greenhouse monitoring system according to claim 3 is 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 at 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 side wall of the flow control ring (54), the diffuse flow channels (56) are in communication 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.

6. The gas sampling device of the intelligent greenhouse monitoring system according to claim 5, 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 micro-holes during rotation adjustment; A driving part (58) is fixed inside the cartridge seat (32), and the driving part (58) is connected to the air guide ring (51) for transmission via a transmission toothed chain.

7. The gas sampling device of the intelligent greenhouse monitoring system according to claim 3 is characterized by: The air intake channel (351) and the air exhaust channel (352) are configured as one-way channel structures; the air exhaust chamber (41) in the air flow disk (4) is located inside the air intake chamber (42), and a plurality of inner flow channels (43) are distributed outside the air exhaust chamber (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 intake chamber (42).

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

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

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